added support for Rouge syntax highlighting

[marianposaceanu]

I use Rouge in my Rails app so instead of installing Python and the pygments gem I forked the lib and added support for Rouge.

It also makes the controller_helpers.rb file a bit cleaner.

Btw. I don't see any tests/specs ?

[dewski]

Thanks for opening this PR. I like the direction you took it, but I commented with a few suggestions.

[marianposaceanu]

Thanks for the feedback and sorry for the late push.

[lucasmazza]

@dewski any plans on still merging this? The patch looks interesting, specially as how Rouge evolved since 2013 :eyes:

[rymai]

@dewski Friendly ping, any chance to get this merged at some point? :)

[dewski]

Hey! Sorry for the delayed response, any chance we can get the conflicts resolved? Then I'll merge.