Merge pull request #19 from nikrowell/master

Added new "router" and "cache" plugins
Merge branch 'master' of https://github.com/bastianallgeier/kirby
Merge pull request #20 from nikrowell/master

Removed some debugging from the router plugin
Merge branch 'master' of https://github.com/bastianallgeier/kirby
added documentation / usage comments to router plugin