Separate Pygments.rb and Rygments

[jclem]

I've separated Pygments.rb and Rygments—mostly for the fact that as far as I can tell, Rygments does not allow taking advantage of Pygments' full set of options (i.e. line numbers). I've added the ability to specify an options hash when using Pygments.rb that gets passed directly to Pygments, for example:

use Rack::Codehighlighter, :pygments, :markdown => true, :element => "pre>code", :pattern => /\A:::(\w+)\s*(\n|
)/i, :logging => true, :options => { :linenos => 'table' }