Clarified some comments.

- Improved version of NeXT patching of $OPT
- Added new option --with-libs='lib1 lib2 ...'
- Define _REENTRANT when posix threads are in use

Now all we need to do is do the same for beta1 compared to 1.3.

(But hypot() should really be defined in a separate file, triggered by
configure.)

- "make install" now depends on "make altinstall" for most of the
work, and the binary is always installed as python<version> first,
with a hard link to python made by "make bininstall".

- Create the machine dependent directory if it doesn't exist, and
attempt to run the regen script in it (unfortunately this will fail
unless you have h2py in your $PATH - help!)

after DESTPATH.

sys.argv, insert "".  Note that "." is removed as a default component
of the path (see changes to getpath.c and Setup.in).

Documented insertion of script directory in path.
Updated author's address.
Changed MAILING LIST section to INTERNET RESOURCES.

Added exp(z).

Added description of strftime format string.
Minor small editing.