Handle stream number exhaustion correctly

Added missing profiling tags.

Create an async QPS client hierarchy

Remove dead file

Fix a typo that resulted in truncating incoming sequence numbers to 24 bits

Remove gcc 4.5 testing and keep 4.4

adding php to cloud to prod tests.

Deliver data up from tcp immediately

Fixed typo

25ns overhead latency timers

Another round of win32 fixes and documentation.

Let's be really pedantic about the status of our submodules.

correct win32-related API usage

-) Fixed a few more (much more rare) race conditions on shutdown.
-) Fixed a degenerate case if we create a server but never start it.

Various Win32 fixes.

Fixing a very edge case where the tcp_client can crash due to race conditions on connection abortion.

-) tcp client and server should no longer starve waiting on orphans
-) proper server shutdown sequence to prevent use-after-free.

By the standard, std::function can only capture class functions, and not
class methods. For some reasons, this works under gcc however. Visual
Studio rejects it. std::mem_fn is proper template to use.