Support installing binaries for modules. Relates #750.
Move cnmultifit app into the cnmultifit module.
Move multifit app to multifit module.
Don't use deprecated method.
Move example app to example module.
Move rmf_tools into rmf module.
Move saxs_tools into saxs module.
Move em_tools into em module.
Pick up command line descriptions from modules.
Don't use deprecated method.