* Such warnings are due to an accumulation of semi-columns in the
    macros defined by KiteLab.
  * The new header file kitelab.hh redefines such macros correctly.
  * Macros have the same name as the original ones prefixed by HPP_.

Remove build-aux submodule and replace it by cmake submodule.
Add basic CMakeLists.txt root file and empty CMakeLists.txt
files in subdirectories.