fixup! Refactored some commands to str_cmd_flags. Planed erase/add/edit of states
Added erase() to class TuringMashine.
Implemented dumb `state erase` command.
Merge pull request #1 from mwuttke97/dbg_erase

Dbg erase
Revert "Use std::cin >> line instead of std::getline() in readBand()"

This reverts commit be6eb029afbbbb31d0331f2a4cebf08cdbea4014.
Some bug fixes