WIP: Colors
ENH: Better case support and property use
FIX: Better cases
ENH: Add hsv
ENH: Add Lab space
STY: Clearer methods
FIX: Fix alpha insertion
FIX: Fixed test
ENH: Better conversion
ENH: Add basic linear gradients
FIX: Suggested fixes
STY: Fix
ENH: Add CSS colors
STY: Fix comment
STY: Minor fix
FIX: Sty
FIX: No json needed
Change qt -> pyqt4
Merge pull request #293 from mfkaptan/backend_name_fix

Change qt -> pyqt4
Add support for parent keyword at Canvas init.