Utility functions to help with scanning for and loading gorilla files.

Ring handlers for Gorilla server functions. Broken out into their own namespace so as to be usable without having to
use Gorilla's embedded HTTPKit server. Note that as well as the handlers there are two functions in this NS,
`update-excludes` and `set-config` that modify the state returned by handlers.

Checks whether a newer version of Gorilla REPL is availble.