0.8.5

0.8.5

This is a minor update release.
Some changes include:

- two-step splash plugin quit fixes
- add generic driver to drm renderer plugin
  This allows new modesetting drivers to work with plymouth automatically
- fixes for video cards that don't support 32bpp
- add alignment and width features to label controls
- new documentation
- event loop fix
- more serial console fixes
- better systemd integration
- new flush api to client library