Simplify run-support project setup in build
Use cross-compiled sbt io dependencies for run-support

Note: the 2.11 dependency is for sbt 0.13.6.
Mark them as provided dependencies.
Remove scripted publish local dependencies

This was duplicating the publish in the runtests script.
And building the docs takes a while.
Clean Flash cookies in Akka HTTP server
Convert Result body into Akka HTTP Empty, Strict or Chunked entities

Previously all results were always Chunked.

- Refactored the buffering code out of NettyResultStreamer and moved
  it into ServerResultUtils so that the Akka HTTP server code
  could use it.
- Simplified the buffering code and added two new methods to
  Iteratee.
- Added tests for ServerResultUtils.cleanFlashCookie.
Use interplay plugin for playdoc and omnidoc settings
Remove api deployment scripts
Merge pull request #3732 from richdougherty/akka-http-integration

Fixes to Akka HTTP server
Merge pull request #3730 from pvlugter/run-support

Update build setup for run-support project
Merge pull request #3733 from pvlugter/interplay

Update aggregated documentation setup