Merged in add_changelog_to_rtd (pull request #14)
Added changelog to TOC on left hand side of documentation. This includes the rendered version of CHANGELOG.rst in the documentation build.
Added __version__ to __init__.py to fix sphinx error.
Added changelog to TOC on left hand side of documentation. This includes the rendered version of CHANGELOG.rst in the documentation build.
Added __version__ to __init__.py to fix sphinx error.