remove rocketfuel waffle switch (bug 894433)
Merge pull request #1584 from cvan/rf

remove rocketfuel waffle switch (bug 894433)
add Cache-Control/Expires/ETags/Last-Modified headers to Marketplace (bug 946845)
remove old tastypie test helper: `assertImmediate`
Don't include the full app serialization in collection reorder errors (bug 951946)

(It's way too noisy, makes logs hard to parse quickly)