Create ActivitiesClient and interface
Fill out the activity model
Working away adding methods
Finish adding methods
Add tests for ActivityClient
Add Observable ActivitiesClient and interface
Rename observable clients and add tests

Renamed to be consistent with non observable classes.
Tests are incomplete.  Need to know where to expose this in the api.
Add ActivitiesClient to IGithubClient.
Fix observable tests
Change name to ActivityEvents
Rename class to IEvents and add IActivities class
Let's instantiate a concrete class and not an Interface!
Apply naming suppression to allow build to build.
Add way to get to ObservableEventsClient
make _connection readonly
Include files in .net45 project
Include files in mono projecrt
edit MonoAndroid csproj
Edit MonoTouch csproj
Merge pull request #170 from pltaylor/ImplementActivityEvents

Implement activity events