tiny-regex-mod

Single file modification of tiny-regex-c by Kokke

Adds a few features and removes some minor issues:

• made it into a single file library
• modified to return a pointer to the start of the match (instead of an integer)
• added option to get a pointer to the end of the match
• removed static use of regex object
• added quantifier operator {m,n} (also {m}, {m,})
• added lazy quantifiers ??, *?, +? and {m,n}?
• merged quantifier (?,*,+,{}) matching into two function (one for greedy, one for lazy)
• added upper limits to quantifiers
• (hopefully) fixed class range matching
• (hopefully) fixed handling of escaped characters
• (hopefully) fixed . matching (doesn't match \r or \n)
• probably butchered print functionality