Squashed 'cgilite/' changes from ac4031b..f144a78

Squashed 'cgilite/' changes from ac4031b..f144a78

f144a78 add universal --debug option
8f60061 unified attibute parsing
686647c correct tests for aria-label anchors
5079618 distinct style for block quoting
751908e autocomplete controls in user forms
e6a85aa use accessibility link label for anchor links
6e9a98e Prefer absolute path when using PWD as _DATA directory (i.e. "$PWD" instead of ".")
364b5f4 markdown code cleanup
aa6ce00 Markdown Bugfix: use correct HTML escaping for heading id's (instead of URL escaping)
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

git-subtree-dir: cgilite
git-subtree-split: f144a78eb6d7bbe8904d31335af0a4f148774140