[BROKEN] Modifying to use the pre-packaged java_home, but I broke it.

I realize that this conflates two major changes in one branch, but I had
to get doppio up-and-running in a Windows environment and gave this a
shot.

Doppio compiles, but something fails at runtime. I have a feeling I'm
missing something in java_home. Committing broken so I can investigate
this further at home.
Merge branch 'opcode-revamp' of https://github.com/plasma-umass/doppio into opcode-revamp

Conflicts:
	package.json