move(state,alphabet) function added in dfa.cpp
NFA to DFA function implemented.TODO compile it :)
dfa.match() implemented
dfa.match() implemented
Trying to merge
compiled
Merge resolution between Gupta's commits & main
Compiling....
Debugged union, kleene_star & wrote print_transitions
Completed debugging the NFA: union, concation & kleene. Implemented pairing in top-down in build_nfa.
regex to nfa final
- Fixed the concatenation problem. NOT sure of the last part in
	build_nfa, most probably it should have no effect (as only
	one pair will remain for concatenation)
- TODO: Escape sequences in input & range operator []