[Graphics] Added generic color definition classes

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[Databinding] Added DataBindingSubContext

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>
[*] Updated build configuration
  - Updated to Tycho-0.16
  - Updated execution environment to JavaSE-1.6
  - Updated mvn plugin versions

Signed-off-by: Stephan Wahlbrink <sw@wahlbrink.eu>