Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

* Add a new 'js' flag to indicate you want to embed a file named 'custom.js'
  which should exist at the root of the wiki

* Change 'github/gollum' references to 'gollum/gollum'

github.github.com/github-flavored-markdown shows a different version of
the page for a split second, and then redirects to
https://help.github.com/articles/github-flavored-markdown so let's just
point there directly.

#572

Gemnasium fixed the missing pygments.rb issue.

https://github.com/laserlemon/gemnasium-parser/commit/c9b3e43c3021967d5c1bb115e7dd1555e01c6444

Base path now sets a default map without having to use an external config.ru.