Merge pull request #12 from TravisEvashkevich/master

hadn't added the approved serialization to the binaryFileFormat
Made it so you can copy a polygon from a polygroup and then Paste it on an imageframe and it will try to find a polygroup
with the same name and overwrite whatever is in the 0 spot. (or add itself if nothing is there)
Ctrl + Enter while on a Polygon or PolygonGroup to jump back one frame (enter jumps one forward so, opposite)