For proper integration with build systems (OpenWrt and RDK-B) it is much
easier if we can build all of prplMesh in a single go with cmake,
without need for maptools.py to build all components.
Add a top-level CMakeLists.txt. For the time being, it only builds the
framework. The helper files move from framework/cmake to the top level.
Update maptools build.py to build the top-level instead of the framework
component.
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
