Fixed 'make_release_tree()' to copy files if 'os.link()' doesn't exist.

command wasn't found or failed.  (Code supplied by Thomas Heller
<thomas.heller@ion-tof.com>.)

before storing or using.

the 'missing' parameter.

Added 'link_static_lib()' method, and 'archiver' and 'archiver_options'
  class attributes to support it.
Added 'link_executable()' method, and 'ld_exec' instance attribute
  to support it.
'newer_group()' is now able to handle missing files, so we don't have
  to kludge it by catching OSError when calling it.
'object_filenames()' and 'shared_object_filename()' now take 'keep_dir'
  flag parameters.
'library_filename()' and 'shared_library_filename()' now respect
  a directory component in the library name.
Various comment updates/deletions.

Added 'link_executable()' signature.

Added 'nuke_release_tree()' method to blow away the directory from
  which the archive file(s) are created, and call it (conditionally)
  from 'make_distribution()'.
Added 'keep_tree' option (false by default) to disable the call to
  'nuke_release_tree()'.

  install) the setup script itself.
Fixed 'build_module()' so we do *not* preserve file mode (which means
  we can install read-only files, which makes the next installation
  of this distribution fail -- at least under Unix); added a comment
  explaining this.

  call CCompiler method 'compile()' with 'include_dirs' not 'includes'.
Fixed stupid typo in 'get_source_files()'.

  consistency with 'build_ext' command option.
Changed 'compile()' and 'link_shared_object()' so 'include_dirs',
  'libraries', and 'library_dirs' can be lists or tuples.

  'generate_help()', 'wrap_text()' functions, and a little tiny test
  of 'wrap_text()'.
Changed how caller states that one option is the boolean opposite of
  another: added 'negative_opt' parameter to 'fancy_getopt()', and changed
  to use it instead of parsing long option name.

  want no output.  Still no option for a happy medium though.
Added "--help" global option.
Changed 'parse_command_line()' to recognize help options (both for the
  whole distribution and per-command), and to distinguish "regular run"
  and "user asked for help" by returning false in the latter case.
Also in 'parse_command_line()', detect invalid command name on command
  line by catching DistutilsModuleError.
  a 'negative_opt' class attribute right after 'global_options'; changed
  how we call 'fancy_getopt()' accordingly.
Initialize 'maintainer' and 'maintainer_email' attributes to Distribution
  to avoid AttributeError when 'author' and 'author_email' not defined.
Initialize 'help' attribute in Command constructor (to avoid
  AttributeError when user *doesn't* ask for help).
In 'setup()':
  * show usage message before dying when we catch DistutilsArgError
  * only run commands if 'parse_command_line()' returned true (that
    way, we exit immediately when a help option is found)
  * catch KeyboardInterrupt and IOError from running commands
Bulked up usage message to show --help options.
Comment, docstring, and error message tweaks.

Bunch of little bug fixes that appeared in building non-packagized
distributions.  Mainly:
  - brain-slip typo in 'get_package_dir()'
  - don't try to os.path.join() an empty path tuple -- it doesn't like it
  - more type-safety in 'build_module()'

Now supports the full range of intended formats (tar, ztar, gztar, zip).
"-f" no longer a short option for "--formats" -- conflicts with new
  global option "--force"!

on the manifest file syntax.

  global options table.
Every Command instance now has its own copies of the global options,
  which automatically fallback to the Distribution instance.  Changes:
  - initialize them in constructor
  - added '__getattr__()' to handle the fallback logic
  - changed every 'self.distribution.{verbose,dry_run}' in Command to
    'self.{verbose,dry_run}'.
  - filesystem utility methods ('copy_file()' et al) don't take 'update'
    parameter anymore -- instead we pass 'not force' to the underlying
    function as 'update'
Changed parsing of command line so that global options apply to all
  commands as well -- that's how (eg.) Command.verbose will be initialized.
Simplified 'make_file()' to use 'newer_group()' (from util module).
Deleted some cruft.
Some docstring tweaks.

  the code a bit and should make it work under Windows even with trailing
  backslash.
Fixed a couple of docstrings.
Added comment about 'make_file()' possibly being redundant and unnecessary.

-q/--quiet reasonably elegantly.

  - change how we call it
  - added methods 'library_dir_option()', 'library_option()', and
    'find_library_file()' that it calls
Added 'force' flag; it's automatically "respected", because this class
  always rebuilds everything!  (Which it to say, "force=0" is not respected.)

Catch up with changes in 'gen_lib_options()':
  - change how we call it
  - added methods 'library_dir_option()', 'library_option()', and
    'find_library_file()' that it calls
Added 'force' flag and changed compile/link methods to respect it.

  has a directory component, then we only search for the library in
  that one directory, ie. ignore the 'library_dirs' lists for that
  one library.
Changed calling convention to 'gen_lib_options()' again: now, it takes
  a CCompiler instance and calls methods on it instead of taking
  format strings.  Also implemented the new "library name" semantics
  using the 'find_library_file()' method in the CCompiler instance.
Added 'force' flag to CCompiler; added to constructor and 'new_compiler()'.
Added 'warn()' method.

Slightly improved the code for dealing with newline on a comment line,
  and for stripping whitespace.

Catch up with renamed 'platdir' -> 'build_platlib' option in 'build'.
Don't call 'set_final_options()' in 'run()' anymore -- that's now
  guaranteed to be taken care of for us by the Distribution instance.
If 'include_dirs' is a string, split it on os.pathsep (this is half-
  hearted -- support for setting compile/link options on the command
  line is totally lame and probably won't work at all).
Added 'get_source_files()' for use by 'dist' command.
Added code to 'build_extensions()' to figure out the "def file" to use
  with MSVC++ and add it to the linker command line as an "extra_postarg".

Don't call 'set_final_options()' in 'run()' anymore -- that's now
  guaranteed to be taken care of for us by the Distribution instance.
Rearranged to bit to allow outsiders (specifically, the 'dist' command)
  to find out what modules we would build:
  - 'find_modules()' renamed to 'find_package_modules()'
  - most of 'build_modules()' abstracted out to 'find_modules()'
  - added 'get_source_files()' (for the 'dist' command to use)
  - drastically simplified 'build_modules()' -- now just a wrapper around
    'find_modules()' and 'build_module()'

Tweaked some help strings to be consistent with documentation.
Don't call 'set_final_options()' in 'run()' anymore -- that's now
  guaranteed to be taken care of for us by the Distribution instance.