Merge tag '0.4' into develop

v0.4
Updated VS project file
Updated VS projectd file
Use unittest framework
Bugfix: copy list before traversal
Cleanup
Add filter as alias to where
Added zip and zip_array methods
Added Disposable.create
Added connectedobservable, publish, partition and multicast
Merge branch 'develop' of github.com:dbrattli/RxPY into develop
Added Observable.let
Fixed typo
Fixes and testes for pausable
Removed some debugs
Moved some more tests
More tests
Updated readme
Bumped version
Merge branch 'release/0.5'