build: set a new spray version that will override 1.1-M7.1 by usual ivy rules
build: redo java compiler target version = 1.6 which got lost in merge
remove mutable.Queues because of their memory leak
can: remove useless reference to request in ClientFrontend
openssl: add names to ExDataSlots for debugging purposes
openssl: don't keep strong references to the PipelineCtx from native heap
openssl: move comment
openssl: support for getting TCMalloc stats
openssl: count and report on created / freed ssl instances
io: don't rely on createConnectionActor to start client side initialization, but send Connected through pipeline once properly registered with IOBridge
spray-openssl: start handshake on Connected event instead of relying on custom StartHandshake which may arrive too soon