site & docs: complete spray-utils docs
docs: finish initial version of the spray-http docs
can & servlet: prevent the rendering of "special" headers
sbt: upgrade mimepull from 1.6. to 1.8
io & can: improve PipelineStage testing infrastructure
io: flexibilize MessageHandlerDispatch architecture
can: improve HttpServerPipelineSpec, add a few more test (now failing 2)
io: simplify MessageHandler architecture once more
util: make sender in LazyActorRef `handle` implicit
io & can: refactor HttpServer frontend for clarity and correctness, add and improve tests
Improve spray-can streaming examples
can: fix broken test
routing: add Directive.unwrapFuture
routing: simplify SecurityDirectives using new unwrapFuture functionality
routing: simplify ConcatMagnet
routing: fix bug in `|` Directive combinator
can: make HttpServerPipelineSpec test more timing resilient
routing: give the HttpService an implicit ExecutionContext
routing: simplify `authenticate` directive once more
routing: fix Rejection infrastructure to only work with List[Rejection] rather than Seqs