Updated README to include req'd packages.

Also, corrected my name in conf.py. :-P
Removed _build directory from docs/

This requires that the user build this, ensuring that it isn't out of date
compared to the source in the commit.
Added .gitignore for docs generated in _build.
Removed *pyc files and added them to gitignore.
Corrected URLs in docs/README.md.
Merge pull request #4 from dwhswenson/docs_iss3

Docs (Issue 3)
Merge pull request #8 from dwhswenson/master

python/docs cleanup