inline the icmpeq for the initial discriminant check in switch statements
a little cleanup
return undefined from everything in TreeVisitor (aside from @visit.)  Also add toString methods
add eval so we can throw a helpful exception about ejs not supporting eval
comments
we should tune the max heap size... 256 for osx seems reasonable for now.
get these things working
don't filter out the esprima tests
more node_path stuff for running these