- added package name to hierarchy
- made sure hierarchy was appended correctly in recursion
- fixed Test.py to test single files, and to produce total result

- added CompEnv, which is a special enviornment for CompNode where it
also stores the imported stuff and the package name, so you can search
the globalEnv with those as well
- added type linking to ClassNode, where it checks the extends and
implements classes/interfaces and makes sure that they are real, and
stores them as the nodes in ClassNode