Starting prototype of new editor
Document analysis and layer creation
Pass linter
Initial viewport
Added drag action
Added mouse wheel
Added keypress event
Fixed editor startup
Added style sheet
Editor: Set aspect ratio
Fix: correct coordinates for zoom center
Stub for timeline view
Add support for frame selection/deselection
UI to add layers to the timeline view
Singletons for editor views
Setup JSHint options in .jshint
Reorganized source tree
Add frames
Get viewport state
Moved layer management to viewport