FlxPhysState:

- Nape debug graphics added camera zoom offset - debug graphics follow camera correctly  with any zoom.

FlxCamera:

- Camera Lerp added.
- Camera Lead added.
- Fix for camera styles with lerp and lead.
- FlashOffset update on set_zoom (aka fix #66) commented.
Merge remote-tracking branch 'origin/flixelNME' into flixelNME