added necessary graph library to build. gradle-refresh necessary
Merge branch 'master' of https://github.com/swp-uebersetzerbau-ss13/javabite
added minimal AST visualization.
little bug fix to avoid iterator modification error in Closure computation
added completely MS2-compatible and almost MS3-compatible grammar definition
completed grammar definition as complete as possible
optional parent of node implemented. Also, branchnode is prepared for upcoming interfacechange
parser is ms2-complete (disregarding semantic analysis)
Merge branch 'master' of github.com:swp-uebersetzerbau-ss13/javabite into backend-refactor