Add hotkey Shift+CMD+Q in editor for quit to project manager, resolves
issue #406
Add 'mesh/skeleton' property to MeshInstance to decouple mesh->skeleton from child parent constraint
Auto generate editor_icons.cpp to make it more easy to update editor icons
Add sCons dependency for editor_icons.cpp, so it's only re-generated when there're icon changes
Fix potential null exception in screen button without texture assigned
Fix script editor scrollbar disappear issue
Merge pull request #434 from marynate/PR-fix-script-editor-scroll

Fix script editor scrollbar disappear issue
Merge pull request #432 from marynate/PR-fix-screen-button-null-texture

Fix potential null exception in screen button without texture assigned
Merge pull request #415 from marynate/PR-auto-editor-icons-cpp

Auto generate editor_icons.cpp to make it easy to update editor icons
Merge pull request #413 from marynate/PR-decouple-skeleton-mesh

Add 'mesh/skeleton' property to MeshInstance
Merge pull request #410 from marynate/PR-hotkey-quit-to-pm

Resolve issue #406 by adding hotkey for "quit to project manager"
Add pan mode in 2d editor
Merge pull request #368 from marynate/PR-2d-editor-ux

Add pan mode to 2d editor