CMake prebuild system: Initial commit that has most of the basics down. Only tested on windows atm. TODO: Properly support examples, tests and cpp11 defines to build websocketpp in different setups.
Fix stdint.hpp for <=VC9.
Fix intrusive_ptr template init on windows. The second template argument should probably be removed if its not neccesary for other platforms. I did not find boost documentation for what the second argument actually does, but in the meanwhile ifdeffed so that builds on windows (yes its ugly). Fixes #198 (with a semi hack).
CMake continued: Try to detect g++, clang, windows and osx and setup appropriate defines and build flags. Improve so that each setup can define platform, boost and ssl libs. I tried to copy everything that I could from the scons scripts, probably some of this can be removed (might be automated from cmake already), left todo:s for that. Added building simple examples, more to follow. NOTE: This has only been tested on windows.
Merge remote-tracking branch 'upstream/0.3.x-cmake' into cmake_prebuild_system

Conflicts:
	websocketpp/endpoint.hpp
Merge pull request #219 from jonnenauha/cmake_prebuild_system

Cmake prebuild system against 0.3.x-cmake