64-bit windows agent, check_mk_agent_x64.exe, Visual Studio 2010 configuration
* agents/windows/check_mk_agent.cc
  changes for vc++
* agents/windows/.gitignore
  ignore visual studio cruft
  130113: corrected line endings
* agents/windows/check_mk_agent.sln
* agents/windows/check_mk_agent.vcxproj
* agents/windows/check_mk_agent_x64.exe
* agents/windows/dirent.c
* agents/windows/dirent.h
Implementation of gettimeofday() for windows.
Updated check_mk_agent_x64.exe