Goofing around a bit with plugging in Rack::Auth::Travis

but then getting distracted by JSON stuff, and second guessing putting
this bit in config.ru...
Too much stuff.  Namespace adjustments, introducing layers, rack tomfoolery

and an executable.  Madness.
Getting the standalone script working again

including properly passing `ARGV` to `Rack::Server` and adding a
top-level `#app` module function for convenience.
Filling in travis payload handling (I hope)
Backfilling some test coverage.  TDD fail. :scream_cat:
Switching to rubygems version of rack-auth-travis
Merge pull request #1 from modcloth-labs/using-rack-auth-travis

Using rack auth travis