Added reference to Mono.Android.Support.V4.
Changed MvxActivityView base class to support library FragmentActivity.
Added MvxFragmentDataStore class, used for passing data from Activity to Fragment.
Added IMvxAndroidFragmentView interface to retrieve the MvxFragmentDataStore.
Added MvxFragment to be the base class for all Fragments.
Added MvxBoundFragment to simplify dealing with fragments when using bindings.
Added Mono.Android.Support.V4 reference to sample projects.
Moved Fragment classes into a different namespace.
Moved MvxFragmentDataStroe.ValueChangedEventArgs to MvxFragmentDataEventArgs class.
Added IMvxFragmentDataStore interface to provide the MvxFragmentDataStore functionality.
Merge pull request #2 from Roosmaa/feature/addFragmentSupport

Add fragment support to the framework