Work in progress for import packages. In this versio ONLY SINGLE IMPORTS and package...

Work in progress for import packages. In this versio ONLY SINGLE IMPORTS and package declarations at a level OTHER THAN THE MAIN FILE work at the moment. A class Foo in package bar.tar would be internally renamed to bar___________tar___________Foo and that's basically how it works at the moment. Multi-imports (import on demand) to comeIR/ClassDescriptor.java