- fixed getParseTreeNodes
- fixed getting name for TypeNode

- 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

- can now successfully check that class has at least one constructor
- added rule fixing `this.x = 123;` in `J1_publicfields.java`
- cleaned up Test.py a bit more

- added AstBuilding.py
- new AstNodes.py that stores all Nodes and different types that we'll
create
- cleaned up Parsing.py heavily, now returns the parse tree
- cleaned up Test.py as best I could to accomodate everyone
- removed not needed file utils.py
- commented out my code in Weeding.py

- added new methodOrField thing that lets you invoc methods and fields
recursively infinitely
- statement can now declare and define any type
- removed arrayID nonterminal
- adjusted arrayAccess because of arrayID removal
- added a cmd in README to make my workflow more convenient
- commented out all the many many many prints in Test.py

- added superClass and superInterface empty rules
- added print errors to parsing
- added a relevant thing in README

- fixed some error handling in parsing
- needed to reset global vars after each test
- added some more logic for testing Parsing in Test.py to match Scanning