moved localization bundle properties to src/main/resources folder following maven convention
Update README.md
Merge pull request #14 from prashantbhat/master

Moved localization bundle properties to src/main/resources folder
Reuse Color objects in GrayPaintScale, plus tightened up parameter checking for PaintScale methods.
Fixed typo in comments.
Merge remote-tracking branch 'gilbert/master'

Conflicts:
	src/main/java/org/jfree/chart/renderer/LookupPaintScale.java
	src/test/java/org/jfree/chart/renderer/GrayPaintScaleTest.java
	src/test/java/org/jfree/chart/renderer/LookupPaintScaleTest.java