libretroshare (not all build options yet) and it's dependencies can now
be built using CMake instead of qmake.
Even Qt itself deprecated qmake, which is not developed anymore, as
build system and it was making many things much more difficult
and requiring an enormous amount of black magic to support a wide
range of platforms.
libretroshare can now easly be build as static or shared library with
simple commands and a maintaniable build system:
```
cmake \
-D RS_LIBRETROSHARE_STATIC=OFF -D RS_LIBRETROSHARE_SHARED=ON \
-S $YOUR_RS_SOURCE_DIR/libretroshare/ -B .
make
```
