refactored command line interaction
detects tty to process input accordingly
deleted translators, agents and wrapper modules
Merge branch 'deletefunctions'
Merge branch 'master' into lr0

Conflicts:
	pydsl/Function/SyntaxDirected.py
	tests/test_Alphabet.py
	tests/test_Transformer.py
added grammar for tests
improved str function
fixed bug: using Ensymbol class instead of instance
renamed __transitiondic -> transitions
added auxiliary functions __len__, __eq__