Update scrollbar gutter to make less visible
Make tools sticky on screen's left edge

So that the drawing canvas can expend full height
Fix selected state for tools on load
Clean up image  folder names and remove unused icon images
Quick poor fix palette/colorpickers
Fix save/upload buttons UX

- new look and feel
- upload for png spritesheet & animated gif
- remove host code (window.open) from spritesheetRenderer
Move 'add frame button' to preview frames

and change UXD
Fix Travis
Fix Travis 2
Merge pull request #105 from juliandescottes/proto-ui-1

A bunch of UI changes - Again