Start 0.10.4 development
Make the static file hashing an optional feature (default off)

Also add a test case to make sure that static files still work in both cases (enabled and disabled).
Release 0.10.4: sandybox: paxswill: that is 100% the job of the web server

Back out the asset hashing added in last version, making it optional.
Merge branch 'master' into release

* master:
  Release 0.10.4: sandybox: paxswill: that is 100% the job of the web server
  Make the static file hashing an optional feature (default off)
  Start 0.10.4 development