Starting to add a panel for selecting which regions to analyze.
Started converting the average velocity to a 2d array, one for the arenas and one for the velocities of each fly in that arena.
graph panel now displays different lines for data from different arenas
graph panel SHOULD now correctly label x axis
Added a legend type thing that writes the name of the arenas in the color of that arena on the graph panel. Added an array of colors that are chosen from for the lines on the graph.
Merge branch 'master' into AnalyzeSelectedAreas

Conflicts:
	src/edu/lclark/drosophila/AnalyzerGui.java
	src/edu/lclark/drosophila/AnalyzerPanel.java
	src/edu/lclark/drosophila/GraphPanel.java