Jump through hoops to get JUnit 4.11 to work

	Change the JUnit 3 whatever dependency to JUnit 4. This is probably
extremely inadvisable to do. Someone should ask Peter B about this prior
to merging this into master. Also remove a bunch of @Override
annotations that Eclipse thinks aren't valid.
Ugly hack to fix issue 12

  Make the sample panel select an index upon loading a file. This causes
sample panel to redraw.
Revert "Jump through hoops to get JUnit 4.11 to work"

This reverts commit 57a5ec2ef2c73078f076cf9f41d5bada547ebf24.
Merge pull request #20 from purpleplatypus/issue_12

Issue 12