Add option to specify package of R class. Issue #607.
Merge pull request #609 from adrianroos/develop

Add option to specify package of R class. Implements issue #607.
Merge pull request #569 from rom1v/cancel_background

Cancel background tasks
Serialized @Background task cancellation bugfix

If a serialized @Background task was cancelled after it had been
submitted to the executor but before its run() method was called, then
the following tasks with the same serial identifier were not executed.

Issue reported here:
https://github.com/excilys/androidannotations/pull/579#issuecomment-19173978

Detected by ThreadActivityTest#cancellableSerializedBackgroundTasks()
(but not always due to the race condition)
Merge pull request #624 from rom1v/cancel_background_fix

Serialized @Background task cancellation bugfix
Merge branch 'AndroidAnnotations-Original/develop'