Squashed 'cgilite/' changes from 67422ab..898d470

Squashed 'cgilite/' changes from 67422ab..898d470

898d470 optimized emphasis regex for performance in mawk
42028f5 improved tests for nested emphasis
98df52b modify regexes for use in mawk
b6f82bc avoid recursion in _block function to increase compatibility
c46fa28 avoid some recursion vor better compatibility and performance
1744198 test wiki links and some full pages
b329161 bugfix Wiki Links, bugfix regex syntax
1653669 compatibility changes: no gensub function
7ba97e6 include mawk tests
61d13e2 tests for references and macros
fd3f517 additional tests
d8f6cff additional checks, check different awk implementations
ccc93a0 minor fix: in fenced divs and fenced code blocks, omit empty class attribute
71c7ca6 additional checks, minor "bug"fix: no newline befor definition lists (for consistency)
3d649b9 more tests
798cbf8 test cases for markdown processor

git-subtree-dir: cgilite
git-subtree-split: 898d470f90e4055d0bcfe616bc009cca8d7f5692