- point to main Calamares site in the 'part of' headers instead
of to github (this is the "this file is part of Calamares"
opening line for most files).
- remove boilerplate from all source files, CMake modules and completions,
this is the 3-paragraph summary of the GPL-3.0-or-later, which has
a meaning entirely covered by the SPDX tag.
The intended license for the CMake modules is BSD-2-Clause;
there's no desire to restrict what can be done with these,
and CMake modules are generally 2-clause licensed.
- The auto-generated code produces a lot of warnings from
Clang 8; this obscures the more meaningful warnings from
actual Calamares code, so tone the warnings down.
- For Clang, set CALAMARES_MOC_OPTIONS.
- Add convenience CMake function for automoccing. It applies
the options as needed to a given target.
