Squashed 'cgilite/' changes from 7f444e3..1ac47c1

Squashed 'cgilite/' changes from 7f444e3..1ac47c1

1ac47c1 fix bidirectional arrow
b7f8f3d bidirectional arrows
71de623 use attributes in wrapper class for fenced code blocks
0c39114 bugfix: prevent content duplication when deleting nonexist key
b8dae07 updated copyright info
ac4031b allow `check` function for field indexes
290cc67 bugfix: avoid endless loops for some incomplete matches
32b4555 split/modify some regexes for compatibility with old mawk implementations
9b019ee simpler reex for matching email links (again, for portability )
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
67422ab fix faulty call of HTML function

git-subtree-dir: cgilite
git-subtree-split: 1ac47c1fc5f20832245d950b67f6be8f8da4172d