Changed the versions to Spray 1.2-M8 and Akka .2.0-RC1

Akka 2.2.0-RC2 is not binary compatible with RC1, which is what Spray has been compiled against
Set the release version for the spray-1.2 branch to 0.8.1.2
Upgraded to specs2 version 2.0 without any problems
Merge branch 'master' of github.com:agemooij/riak-scala-client into spray-1.2

Conflicts:
	build.sbt
Merge branch 'master' of github.com:agemooij/riak-scala-client into spray-1.2
Released a version 0.8.2.2, requested by Heiko so there is a release that is compatible with the final release of Akka 2.2.0

It depends on Spray 1.2-20130726
Removed scct from the build
Set current version to 0.8.4.2-dev
Merge branch 'master' of github.com:agemooij/riak-scala-client into spray-1.2

Conflicts:
	build.sbt
	project/plugins.sbt
Updated all outdated dependencies to their latest versions
Adjusted the tests for Riak 1.4 behaviour
Released version 0.9.0