- change Test.py to run reachabilityChecking
- basic ASTNode reachCheck
- implemented reachability in: MethodNode, IfNode, WhileNode, ReturnNode
- tiny bit of cleanup (whitespace)

- show elapsed time in Test.py
- GlobalEnv no more '.' in front of types without a package
- lots of GlobalEnv:getNode fixes
- fixing but still testing GlobalEnv:weedGlobalEnv
- cleaned up some comments

- added fieldType to FieldNode
- added myType to NameNode
- fixed NameNode:checkStatic
- recursively calling disambigName exactly the same as how we do
checkType
- starting NameNode:checkType
- cleaned up Test.py commented code

Added code for Name disambiguation. Fixed CFG for field access. Moved test cases to the correct directory. Not tested yet

- 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

- 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