update Scala 2.11.0-RC1
optimize IList.fill

Cherry-picking bcb952b
optimize IList#span, splitAt, takeWhile

Cherry-picking a6d20ee
fully update to 2.11.0-RC1
Setting version to 7.0.6
Setting version to 7.0.7-SNAPSHOT
Scala 2.11.0-RC3
Add Coyoneda.{Aux,lift} from 7.1; deprecate Coyoneda.apply.
Merge pull request #678 from S11001001/topic/7.0+coyoneda-transition

Add Coyoneda.{Aux,lift} from 7.1; deprecate Coyoneda.apply.
Merge branch 'series/7.0.x' into scalacheck-backport

Conflicts:
	project/build.scala
Remove scala 2.11