Convert all four visualization tools to use WALA Source front end

At first glance, the variable names are better preserved and are more
easily mapped back.

See #24.
Hide context information until mouse hover

See #26.
Do not smash classes that only have primitive types
Merge branch 'java-source-analysis'

Conflicts:
	edu.illinois.jflow.wala.core.ui/src/edu/illinois/jflow/wala/utils/EclipseProjectAnalysisEngine.java