[meta,cmake] Restructure project and introduce CMake tooling

Rearrange project to conform to current best-practices in modern C++ repo organization.

Introduce initial configuration file for the CMake meta-build system, based on the restructured organization.

scripts/scdaqrpm.sh

@@ -134,7 +134,6 @@ mkdir -p external/
 
 cp -R $BASEDIR/src SOURCES/
 cp -R $BASEDIR/include include/
-cp -R %BASEDIR/external external/
 
 %build
 echo $RPM_SOURCE_DIR