deprecated after all.  But now they're only implemented once, instead
of N times.

implementations.  Details:
  * replace 'link_shared_object()', 'link_shared_lib()', and
    'link_executable()' with 'link()', which is (roughly)
    the union of the three methods it replaces
  * in all implementation classes (UnixCCompiler, MSVCCompiler, etc.),
    ditch the old 'link_*()' methods and replace them with 'link()'
  * in the abstract base class (CCompiler), add the old 'link_*()'
    methods as wrappers around the new 'link()' (they also print
    a warning of the deprecated interface)

Also increases consistency between MSVCCompiler and BCPPCompiler,
hopefully to make it easier to factor out the mythical WindowsCCompiler
class.  Details:
  * use 'self.linker' instead of 'self.link'
  * add ability to compile resource files to BCPPCompiler
  * added (redundant?) 'object_filename()' method to BCPPCompiler
  * only generate a .def file if 'export_symbols' defined

(was crashing on any boolean command-line option!).

Standardize whitespace in function calls.

Standardize whitespace in function calls.

than rolling our own with fancy_getopt's 'longopt_xlate' global.

Removed script options -- don't think they ever worked, weren't
  very well thought through, etc.

with the bdist_* commands.

"no", "0", etc. to true/false.

  * options can now be spelled "foo-bar" or "foo_bar" (handled in
    'parse_config_files()', just after we parse a file)
  * added a "[global]" section so there's a place to set global
    options like verbose/quiet and dry-run
  * respect the "negative alias" dictionary so (eg.) "quiet=1" is
    the same as "verbose=0" (this had to be done twice: once in
    'parse_config_file()' for global options, and once in
    '_set_command_options()' for per-command options)
  * the other half of handling boolean options correctly: allow
    commands to list their boolean options in a 'boolean_options'
    class attribute, and use it to translate strings (like "yes", "1",
    "no", "0", etc) to true or false

easier extensibility).

Standardize use of whitespace on function calls.

as well as scheme, and don't convert all installation paths (that's now
done by the "install" command for us).

'convert_paths()' method to convert them all to the local syntax (backslash
or colon or whatever) at the appropriate time.

Added SCHEME_KEYS to get rid of one hard-coded list of attributes (in
'select_scheme()').

Default 'install_path_file' to true, and never set it false (it's just
there in case some outsider somewhere wants to disable installation of the
.pth file for whatever reason).

Toned down the warning emitted when 'install_path_file' is false, since we
no longer know why it might be false.

Added 'warn_dir' flag to suppress warning when installing to a directory
not in sys.path (again, we never set this false -- it's there for outsiders
to use, specifically the "bdist_*" commands).

Pulled the loop of 'change_root()' calls out to new method 'change_roots()'.

Comment updates/deletions/additions.

up when the pathname starts with '/', which is needed when converting
installation directories in the "install" command.

resource files.  The gist of the patch is to treat ".rc" and ".mc"
files as source files; ".mc" files are compiled to ".rc" and then
".res", and ".rc" files are compiled to ".res".  Wish I knew what
all these things stood for...

on other systems, so that data, headers, scripts are included in
the installer.

  in a string (gives you something to do with the dictionary returned
  by 'parse_makefile()').
Pulled the regexes in 'parse_makefile()' out -- they're now globals,
  as 'expand_makefile_vars()' needs (two of) them.
Cosmetic tweaks to 'parse_makefile()'.

  easier for people porting Makefile.pre.in-based extensions to Distutils.
Also loosened argument-checking in Extension constructor to make life
  easier for 'read_setup_file()'.

are completely skipped, rather than being treated as blank lines
(and then subject to the 'skip_blanks' flag).  This allows us
to process old-style Setup files, which rely on
  hello \\
  # boo!
  there
coming out as "hello there".

Fixed precendence bug that meant setting skip_blanks to false didn't work
under some circumstances.

Factored the guts of 'warn()' out to 'gen_error()', and added the
'error()' method (trivial thanks to the refactoring).

Dropped the 'collapse_ws' option and replaced it with 'collapse_join' --
it's *much* faster (no 're.sub()') and this is the reason I really added
'collapse_ws', ie. to remove leading whitespace from a line being joined
to the previous line.

(eg. "bdist_dumb", to generate both ZIP and tar archives in the same
run), tell all but the last run to keep temp files -- this just gets
rid of the need to pseudo-install the same files multiple times.

Run "install" the right way, by calling 'run_command()'.