set paper to 0.9.9 specifically

Noticed an issue when paper was allowed to update to 0.9.15:

When setup method is executed on the canvas element, the element grows
in size.
add colorpickersliders and basic markup

- Add ColorPickerSliders script/styles and dependencies (tinycolor)
- Add checkbox to enable custom levels
- Add ColorPickerSliders input
apply custom color value to level flag
update spinner behavior for custom level #38
add .DS_Store