Add do_regex
Operators * / % =~ !~ had wrong precedence, fixed
Change operator precedence of bitwise operators to be hight than logical checks
Updated documentation to reflect changes in precedence
Updated documentation
Changed the regex system a bit. All values now support the do_regex method, and passes toString() to the do_pattern_match-function of RHS. If RHS is not a regexp (function not overridden), a runtime error is thrown.
Simple regex engine complete