Updated build tools

Bumped gradle to 1.11, android plugin to 0.9.+, buildTools to 19.0.3
Target latest SDK and support library

Updated to sdk 19 and support lib v19. Deleted support-v4 dependency, since it is included into appcompat-v7
Loaded color picker from MavenCentral

Color picker dependency was added to maven central, but changed package name.
Changed package name for demo project

The android plugin now enforces that all library dependencies have a unique package name.
http://tools.android.com/tech-docs/new-build-system (0.9.1)