The extra target doesn't `#define` any of `WIN32_LEAN_AND_MEAN`,
`NOMINMAX`. The default `mio::mio` adds both of these. This commit also
removes these defines from the `.*pp` files; they're now inserted by the
compile commands.
This commit introduces several features for the CMake build system.
+ CTest integration
+ CDash integration
+ CPack integration
+ CMake find_package support
To accomodate post-installation consumption, the `include` preprocessor
statements in several library header files were updated to use paths
relative to a root include directory rather than paths relative to the
file itself.
