updated readme for clarity and style.
updated readme.
pulling README from remote
switched skipIf to skipUnless (because (not VAR)) was used.
Version bump, added 'pyval' symlink to run from.
added local release dir to .gitignore
changed help strings
Added pyvalexec symlink, added --version.

pyval_exec.py is symlinked to pyvalexec,
so you can just run ./pyvalexec or even
pyvalexec (if it's in /usr/bin or likewise).

added -v,--version flags to command-line args.
if it's going to be a stand-alone command it needs
to be more well-behaved and not look like it was
just glued together to run from the command line.
better command-line help