Dev:Roadmap/Frame-by-frame animation (bitmap)

(TODO) Import images as groups with "Children Lock" enabled
[DONE] Integrate brushlib
[DONE] Enable painting for Image layers
[DONE] Autoextend image size (infinite canvas)
[DONE] Undo functionality
[DONE] Allow to save edited image
(TODO) Allow editing for embed images only
(TODO) Automatically convert external image to embed when painting is requested
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(TODO) Switch group
(TODO) Allow to insert new images/keyframes into canvas
(TODO) Hotkeys
- F6: New keyframe
- F7: Empty keyframe
(TODO) Copying of image layer from one SwitchGroup to other should produce a waypoint at current time
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(TODO) Interface to choose brush
(TODO) Automaticaly import MyPaint's brushes from system location