add golo syntax markers in asciidoc documents
Yannick Loiseau joins as a contributor

Signed-off-by: Julien Ponge <julien.ponge@insa-lyon.fr>
Merge pull request #137 from yloiseau/master

Golo syntax markers in asciidoc documents

Requires https://bitbucket.org/yloiseau/pygments-main/commits/9800174a39ca1e4c357423bc15b4bd0f52b97599 until Yannick's pull-request is merged
into Pygments (https://bitbucket.org/birkenfeld/pygments-main/pull-request/309/add-golo-lexer/diff).