Fix issue #321: the result of a Future can be another Future, so we unroll them until we have an actual result
Release note.
Fix Jetty uninitialized value error.
Clean up some import warnings.
Merge branch '2.2.x_2.9' into 2.2.x_2.10

Conflicts:
	core/src/main/scala/org/scalatra/FutureSupport.scala