Added Scala support, removed mirah support from android app target, refactored execute_process and tweaked code style in a few places.
Created general export forwarding function for all index.coffee files and got unit tests to pass.
Remove mirah support completely and get integration tests to pass (by any means necessary, so not all changes are correct).
Replace all index.coffee contents w/ export_dir function.
Added submodules to cakejam.targets to organize targets more.
Added generate operation and generator for AndroidApp targets.