Update for Dropwizard 0.7-SNAPSHOT
Fix scalacOptions for cross compilation of older Scala versions.
Update for dropwizard 0.7.0-rc1.
Fix README.
Bump to 0.7.0.
Fix versions and remove higherKinds so it compiles for 2.9.
Merge branch '0.7.x'

Conflicts:
	README.md