Benchmark HttpHeaders.apply.
Merge branch 'topic/develop-before-ross-got-reckless' into develop
Tagged lowercase type for case insensitive things.
Revert header cons cell work, but replace all headers case insensitively.
HttpHeaders -> HttpCollection
Bring names into closer alignment with HTTP spec.
Remove Routes.
Merge branch 'develop' into topic/scalaz-task

Conflicts:
	core/src/main/scala/org/http4s/Response.scala
	core/src/main/scala/org/http4s/model.scala
	core/src/main/scala/org/http4s/package.scala
	core/src/test/scala/org/http4s/MockServerSpec.scala
	netty/src/main/scala/org/http4s/netty/Http4sNetty.scala
	servlet/src/main/scala/org/http4s/servlet/Http4sServlet.scala