gplugin/gplugin

Prepare for the 0.31.0 release
v0.31.0
2021-05-27, Gary Kramlich
f25e021e4053
Prepare for the 0.31.0 release

Testing Done:
ran `ninja dist` as well as `ninja all doc test` on the resulting tarball.

Reviewed at https://reviews.imfreedom.org/r/676/
syntax: glob
.*.swp
*.debhelper
*.orig
*.pyc
*.ui~
\#*.ui\#
syntax: regexp
^build.*\/
^packaging\/debian\/tmp\/
^packaging\/debian\/(.+\.)?(substvars|debhelper\.log)$
^packaging\/debian\/build.*\/
^packaging\/debian\/libgplugin0?(-.+)?\/
^packaging\/debian\/gir1.2-gplugin-0.0\/
^packaging\/debian\/files$
^po\/.*\.pot$
^obj-x86_64-linux-gnu\/
^debian\/?$