gplugin/gplugin

Merged in feature/vala-docs (pull request #32)
develop
2019-08-27, Gary Kramlich
a8741522bdf3
Merged in feature/vala-docs (pull request #32)

Added Vala docs and mention it in the ChangeLog

Approved-by: Elliott Sales de Andrade
The following individuals have contributed to this project.
Ankit Vani <a@nevitus.org>
EionRobb <eion@robbmob.com>
Elliott Sales de Andrade <quantum.analyst@gmail.com>
Gary Kramlich <grim@reaperworld.com>
Jason Scherer <schereja@gmail.com>
John Bailey <rekkanoryo@rekkanoryo.org>
Mike Ruprecht <cmaiku@gmail.com>
Olaf Hering <olaf@aepfle.de>
Richard Laager <rlaager@pidgin.im>