WIP: working on routing in GatlingBuildAction

At this point I have a working set of links at the bottom of the main
project gatling page, and can successfully drill into individual gatling
reports.

Code needs a lot of cleanup, and there is one part where I'm advancing
the tokens in the StaplerRequest that is pretty hacky and I'd like to
get rid of it; however, haven't yet seen a better way to pull it off.

Will squash this commit once I've had time to clean some things up
tomorrow.