Starting to plug in static file serving

so that worm handlers can drop artifacts in there and whatnot.
Stubbing in the build index handler
Drying up the handlers a bit while adding travis payload annotation
Filling in more of the travis build indexing stuff
Building index.html for each directory level when storing Travis payloads
Minor test wrap reformat to match others
Merge pull request #58 from modcloth-labs/travis-build-index-handler

Travis build index handler