cpack: use as package creator

We use CPACK (cmake helper) to package the software

- macOS: we build the .APP and .dmg with all dependencies, like qt,
  soapysdr and all others sdr drivers. ENABLE_MIRSDRAPI control if we
  remove the mirsdrapi dylib because it is not public distribuitable;
  so should be used only on "private" environment.
  TODO:
    - code/dmg signature

- Debian: make deb with dependencies for Debian 10/9 and Ubuntu
  18.04/16.04.
  TODO:
    - probably to send the package to upstream we need to use
      debhelper and debian/

- Fedora/rpm: just basic declaration
  TODO:
    - write correctly dependencies

debian/source/format

@@ -1 +0,0 @@
-3.0 (quilt)