Make module into package
Major work on push v3 format, reorganization into package
Added .gitignore
Added docs structure, with some examples
Add WNS & MPNS payload types
Lots of documentation updates
Use UA theme
Existing APIs use version 1 for now
Document exceptions
Add exceptions doc
README update
First pass at rich push.

Will need to reorganize the package and module names.
Add docs/_build/ to ignore
Rename push modules and richpush->message function
Add __all__ references, remove unused func, docs
Fix test
Properly accept integer ios badges
Add scheduled notification sending
Added example for rich push
Merge branch 'unified-api-simple' of github.com:urbanairship/python-library-unified into unified-api-simple