Added clarification about connect on ROUTER
Merge pull request #540 from hintjens/master

Small clarification about connect and ROUTER
Merge pull request #541 from hurtonm/rework_message_flow

Refactor code so that messages go through engines
Merge pull request #542 from hurtonm/master

Use state functions for message flow
Add platform.hpp as project dependency to vc100 and vc110 projects for local & remote throughput tests.
Add vc80 project dependency on platform.hpp for local & remote throughput tests.
Merge pull request #543 from steve-o/vc110_fix

MSVC local_thr & remote_thr dependency fix
[#LIBZMQ-446] Silence error on setting PGM_TOS due to some platforms raising an error at runtime. Noted are RHEL 4.
Merge pull request #544 from steve-o/libzmq-446

[#LIBZMQ-446] Silence error on setting PGM_TOS on REL 4.
Interoperate with higher versions of ZMTP protocol