The JSON test generator has been removed.
I've added regress_one.txt to test an actual feature.
regress_full.txt is to test all the test cases Xpressive has.
regress.txt contains the test cases which should pass with the current state of xlxpressive.
Implemented parts of the grammar: 'bos', 'eos', 'any' and 'item' partially
I've enhanced search.hpp to prevent over-indexing the 'm' vector.