ParserInputGraph determinization

[gsvgit]

Fix #111 first!

In current implementation ParserInputGraph is FA without epsilon transitions. It should be transformed into DFA. It is necessary to simplify regular set parsing with GLL.

If the same ident tokens, but different FAs, will be union, we get incorrect calculation of semantics or another language.

If doesn't matter which FA is in token, you can't store FA in token.