Driver Tweaks
Merging in new driver code.
Merge branch 'gurupras@buffalo.edu' of https://github.com/okennedy/worldtree into gurupras@buffalo.edu

Conflicts:
	src/Driver.java
Merge branch 'gurupras@buffalo.edu' of github.com:okennedy/worldtree into gurupras@buffalo.edu
Added comments to container classes
Merge branch 'gurupras@buffalo.edu' of github.com:gurupras/worldtree into gurupras@buffalo.edu
Merge branch 'gurupras@buffalo.edu' into working