y2r_u: Cleanup some formatting.

Update the code of service y2r!

Qt Frontend: Add Threads::Threads import in CMakeLists.txt

This had been forgotten in df81fa11.

Fixes #1711.

Replace std::map with std::array for graphics event breakpoints

Fixes for #1711 and other compilation errors.

This requires bumping up to a minimum of CMake 3.1. The benefit
of using the imported target is that you can switch to the -pthread
compiler flag on request, which may be necessary for some systems if
available.

Replace std::map with std::array for graphics event breakpoints, and allow the compiler to inline. Saves 1%+ in vertex heavy situations.

Fix various build errors encountered on Clang 3.9 on OS X

Protect use of std::is_trivially_copyable to compile with GCC 4.9

Using the global-namespace C function will cause the wrong
overload to get picked

HWRasterizer: Lighting Sync + Cleanup

Hardware Renderer Texture Forwarding

OpenGL: Implement color combiner Operation::Dot3_RGB

SDL2 Frontend: Use argv[0], add a --version, and reorder options

Fix driver root identification on Windows

SOC:U GetSockOpt/SetSockOpt