Added a new pop up window for editing the graph labels.
Added ability to save graph as an image from the file menu.
Disabled resizability of the graph edit frame. Panel now automatically repaints when apply is hit on the graph edit frame, and the graph edit frame also closes on application.
numbers along axes are now centered on their respective grid lines
Merge branch 'master' into graphfix

Conflicts:
	src/edu/lclark/drosophila/AnalyzerPanel.java
	src/edu/lclark/drosophila/ButtonToolbar.java