~fsx/protobluff

Init all fields.
Don't return in void func.
Fix part of compiler warnings.
free doesn't return anything.
Meson generates package config files.
Add note about coverage.
fmt not needed.
Remove old build scripts.
Replace protobuf's logging. It's not available anymore.
Update README.
Update README (WIP).
Prevent heap-buffer-overflow error when ASAN is enabled.
Silence false-positives from scan-build.
Match for-loop variable type with return type of function used in condition.
Set syntax version in examples.
Meson: Make example and generator optional.
Meson: Add examples.
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