Maintenance release with mainly Windows build fixes.
- Link to online documentation in README
- #194: Include utils by file instead of CMAKE_MODULE_PATH search
- #195: Remove unused program_name variable
- #196: Enable language C for older CMake versions when needed
- #202: Changed include directory in bazel build
- #207: Mark single argument constructors in mutex.h as explicit
- #209: Use inttypes.h on VC++ 2013 and later
- #212: Fix statically linked gflags library with MSVC
- #213: Modify installation paths on Windows for vcpkg
- #215: Fix static initialization order fiasco caused by global registry lock
- #216: Fix use of ARGC in CMake macros
- #222: Static code analyzer error regarding strncmp with empty kRootDir
- #224: Check HAVE_STDINT_H or HAVE_INTTYPES_H for older MSVC versions