huge structural changes; new api; test classes were added
improving finite test class
removing unecessary imports
adding pushdown test classes
bug fixing at DPDARunner
test suite added
moving sample package
abstracting state/transition classes; epsilon transitions are now supported by NFARunner;
removing unecessary state at utils package
better support to NPDARunner; cleaning up examples;
Renaming State class to AbstractState; Refactoring Result class;
multiplies of three example added
string as symbols implemented
tape object added
added documentation at common package
minor bug fixes
Merge pull request #1 from eug/dev

Merge dev branch