Correctly release the DirsLock in exitPostNotification().
Ignore KDevelop4 files.
Use SEEC_FALLTHROUGH to mark intentional fallthrough of switch cases.
Remove the (now) unused update access control from ProcessState.

Access control is all performed in lib/Trace/StateMovement.cpp, where it belongs (specifically it is handled by ThreadedStateMovementHelper).
Remove unused EventReference::dispatch() method.