Simplify CMake build using add_subdirectory#207

Merged

wjakob merged 9 commits intopybind:masterfrom

May 29, 2016

Commits on May 25, 2016

Fix missing variable for Windows build
dean0x7d
committed

Commits on May 26, 2016

Commits on May 27, 2016

Add LTO and strip to pybind11_add_module
dean0x7d
committed

Commits on May 28, 2016

Make C++ standard configurable
dean0x7d
committed