Store the number of frames in common with the enclosing exception
Mark frames common with enclosing as not in_app
Merge branch 'master' into raven-3.x

Conflicts:
	raven/src/main/java/net/kencochrane/raven/event/interfaces/StackTraceInterface.java
	raven/src/main/java/net/kencochrane/raven/marshaller/json/StackTraceInterfaceBinding.java
Remove TODO on chained exceptions

Chained exceptions are supported in raven-4.x and won't be supported in
raven-3.x
Fix unit tests for raven-3.x