Added DiscreteActions for Pitch Trim
Serialization fixes

Fixed manualDeadZones and treatHatsAsButtons not being serialized
properly
Moved toolbar btn ressource

Moved toolbar btn image into addon folder
Save state when any setting window is closed

Saving changes right away should prevent loss of changes in case of
crashes etc.
Merge pull request #14 from ddaf/master

Serialization fixes and an extra DiscreteAction