Rudimentary syntax coloring preferences support - changes are not updated automatically and some color settings seem to be unused at the moment.
Color preferences: Indicate that editor needs to be redrawn in case color preferences change
Remove unused preferences and replace P_DEFAULT with P_SETTING_FILE_WITH_NAME
Improve preference descriptions
Get rid of bright/dark scheme code
Merge commit 'e325b638acad11a94c2b1c9457692834cab2af9c' into i36_preferences

Contains basic syntax coloring preferences.

Conflicts:
	plugin/src/main/java/com/nitorcreations/robotframework/eclipseide/editors/ColorConstants.java
Improve default colors for white background (#36)
Fix the remaining known issue in #36.
Merge branch 'i36_preferences' into release