Merge tag '1.0.0rc6' into develop

v1.0.0rc6
Converted indentation to spaces
Cleanup and PEP8 alignment
Cleanup and refactor
Docstring fixes
Docstring change
Cleanup of docstrings, line breaks etc
Bugfix. Only dispose if not disposed
Docstring fix
Updated changes
Updated readme
Removed unused methods
Added docstring
Merge branch 'develop' of https://github.com/ReactiveX/RxPY into develop
Updated changes
Bumped version
Merge branch 'release/1.0.0'