invert assert so it actualy checks for the correct flag
clear old message if reused for receiving
Merge pull request #29 from benjamg/feature/clear_recv_message

Allow reuse of message in receive, fixes #28
unify and improve frame queue resizing
switch to a more complete frame wrapper to remove special case code
allow reserving frame size in new raw call
Merge pull request #30 from benjamg/feature/simplify_message_frame_queue

Feature/simplify message frame queue
still receive whole message if EINTR acours on later parts
switched to deque to support push and pop front
return to vector, pop/push to front is slower but overall perfomance higher
Merge pull request #31 from benjamg/feature/vector_prepend_prepop_frames

Feature/vector prepend prepop frames