[#6534]  ticket:415 Wiki importer for github
[#6534]  ticket:415 decode wiki page to unicode and fixed kw['tools'] error
[#6534]  ticket:415 remove get_wiki_url from github extractor
[#6534]  ticket:416 import wiki history for github
[#6534]  ticket:416 show checkbox for import wiki history for github
 [#6534] ticket:416 Export only pages in supported formats

 Repo might contain images and other stuff,
 we should export only files which contain wiki pages.
[#6534] ticket:416 Fix checkbox labels
[#6534] ticket:416 Small refactoring
[#6534] ticket:438 fixed regexp
[#6534] ticket:438 codestyle nitpick
[#6534] ticket:438 fixed docstring
[#6534] ticket:438 returned previous date
[#6534] ticket:438 Skip mod_date update while importing wiki
[#6534] ticket:443 Import wiki into existing project
[#6534] ticket:443 Make checkbox label clickable
[#6534] ticket:443 Rename option
[#6534] ticket:443 Fix checkbox appearance
[#6534] ticket:441 Tests for links conversion
[#6534] ticket:441 gollum page links conversion
[#6534] ticket:441 gollum external links conversion