Add Json.Net reference to Joey.
Add Bugsnag data objects.
Add CombiningMemoryStream.

CombiningMemoryStream allows joining together of multiple streams.
Add BugsnagClient.

The current version collects all the required data, but doesn't
implement the sending logic yet.
Add Bugsense error sending on Android.
Fix json property name.
Fix Metadata cloning.
Set AutoNotify default to true.
Make exception handlers virtual.
Add a method to provide additional data to user info.
Make Andorid BugsnagClient feature complete.
Add InstallId to SettingStore.
Integrate Bugsnag with Android app.
Add BugsnagUserManager.

BugsnagUserManager keeps the BugsnagClient in sync with the currently
authenticated user.
Merge branch 'roosmaa-bugsnag'

Crashing errors are now recorded (both .NET and Android) and sent to
the Bugsnag servers first chance possible (either immediately or next
app start).

Closes #12.