- Update to 1.3.1
- Install the themes into /etc/vdr/themes, where stock VDR looks for them;
  they went to /var/lib/vdr/data/themes, which VDR never reads
- Install the widget scripts into /usr/lib64/vdr/skindesigner/scripts, the
  path compiled into the plugin, instead of below /usr/share
- Own a vdr writable /etc/vdr/plugins/skindesigner/installerskins, where the
  skin installer actually clones to, instead of an unused directory below
  /usr/share; recommend git-core, which the installer runs
- Document the /usr/share/vdr/logos default in README and skindesigner.conf
- Fix a parallel build race that compiled in an empty libskindesignerapi
  version (for upstream)
- Link libskindesignerapi with the distribution LDFLAGS (for upstream)
- Require the matching libskindesignerapi, recommend the -data subpackage
- Modernize spec: use upstream's install target, drop Group, the explicit
  ldconfig scriptlets and %{set_build_flags}, rewrite the descriptions