LibreSignage v1.0.2 patch release

This is the second patch release in the LibreSignage v1.0.0 series that
includes a few bugfixes. Users of v1.0.1 are encouraged to upgrade to
v1.0.2 as soon as possible.

This release can be obtained from Docker Hub via the tags "latest" and "v1.0.2"
shortly after the release. This release can also be manually built from source by
cloning the "master" or "v1.x.x" GIT branch and by following the build instructions
included in the readme.

Changelog v1.0.2:
- [bugfix]   Apply a workaround for docker-library/php#865 which broke
             LibreSignage Docker image builds.
- [bugfix]   Use rsvg-convert instead of ImageMagick's convert due to problems
             with convert crashing.
- [bugfix]   Fix a bug that caused display clients with a (permanent) display
             session to be logged out after a certain amount of time.

List of contributors and the number of commits by each one:

9 Eero Talus
This tag has no release notes.