Issue 29 ; Tweaked checkstyle configuration and ran eclipse formatter on the java source in extras. Reduced checkstyle errors from 15693 to 3520. Note this commit contains formatting-related changes only, no code changes.

issue#48 started a unit test

issue#51 aligned package and class names of the tests with the classes under test.

Fix for issue 46: PFrameTest unit test fails on linux

issue#44 subdirectory and artifact rename