Merge pull request #5 from kaitlinhuben/master

HELLO WORLD! Basic compiler skeleton up
created jextractor class (Java extractor) to extract neccessary info from Java files. currently gets method signatures and return types
removed semicolon mistakes
removed semicolon mistakes
Merge pull request #6 from emilyhsia/master

created jextractor class (Java extractor)
Merge pull request #7 from kaitlinhuben/master

Hello World testing main function & removed PLY warnings from Hello World compiler