Add AutoPacket successor satisfaction test
Change to storing next packet in AutoPacketFactory

Normal packet behavior is fine, but Successor functionality has regressed.
Fix tests with new AutoPacket guarantees
Merge branch 'develop' into ref-successors

Conflicts:
	src/autowiring/AutoPacketFactory.cpp
Move m_initTime initialization to Initialize call
Avoid recursive AutoPacket destructor calls
Merge pull request #283 from leapmotion/ref-successors

Finalize successor interface