Emitter old dupe fix

Fixes old duplications containing emitters
Camera duplicator fix

Fixes camera duplication issue ( See
http://www.youtube.com/watch?v=yRX_JKeSpRc )
Static camera has nocollide by default
Fixed "Draw Cameras" in menubar not working
Fixed Trails Tool Undo
Merge pull request #572 from robotboy655/emitter

Tool fixes