MSVC option additions.
Merge pull request #191 from ahmedcharles/msvc_options

MSVC option additions.
Improve qmake C++11 support.
Merge pull request #194 from ahmedcharles/cxx11

Improve qmake C++11 support.
Move code from HostPool.cpp into HostManager.cpp.
Move code from HostPool.h into HostManager.h.
Merge HostPool into HostManager.
Remove unused files.
Merge pull request #182 from ahmedcharles/hostpool

Merge HostPool into HostManager.
Dead code removal.