Set proper content-type header for JSON responses.
Tweak awsboxen script to use new features of awsboxen.
Add a basic loadtest script.
Better error handling when bad hex data is posted.
Merge pull request #15 from mozilla/loadtest

Add basic loadtest scripting. [Great stuff! Because I had already invoked virtualenv outside scrypt-helper, the virtualenv use inside loadtest/ confused me for a minute, but it certainly works.]