Initial commit for upgrade to scala 2.11
Get iteratee tests compiling with Scala 2.11

Implicit resolution must have changed slightly in 2.11. Use a workaround
to disable an implicit inherited from Specs2's ConcurrentExecutionContext
trait.

See: https://groups.google.com/d/msg/specs2-users/m5nn4nSNu0Q/aw4sb7ha_LwJ
Fix compiler warnings in iteratees module
Fix anorm module 2.11 compiler warnings
Got cross building working on 2.11
Added cross building into package script

Ensured that scaladocs compiled in 2.11.

Turns out the work to include managed sources wasn't necessary, because
they were already included, and this broke 2.11.
Merge pull request #2764 from jroper/scala-2.11

Scala 2.11 cross build support