Java-based import resolver
Actually typecheck the compiler results now.
Stopped tostring recursion (the ugly way, add a visted var later..)
Lower-level javaToWyvDecl in Utils.
Decoupled JavaInvoction from Methods, to allow invocations of Constructors.
Implemented Java imports via the module system.

A bit odd - the methods and constructors take a type postfix, so Integer.valueOf becomes Integer.valueOfi, and the like. This may get anoyying...