Clean code
refactor color + add cursor
Add oldcolor to COLOR_CHANGE signal
Reduce _pietSourceClosure function
Add colorToId utility function
Merge colorSelected and colorPicker menus
Improve semantic
Fix css
Improve color picker button semantic
Change default color
Fix instructions button semantic + add some css
Add new/open/save button and fix button css
Add javascript handler to new/load/save buttons
Rename _pietSourceClosure
Fix '{' space convention
Update mootools libraries + fix cdn fallback
move coordinate lib
Secure main function
add (pnglib + mbox) libraries + implement save button
new document implementation