Merge updates from debian/buster

.gitattributes

.github/PULL_REQUEST_TEMPLATE.md

.gitignore

.gitmodules

.travis-apt-pin.preferences

.travis-create-release.sh

.travis.yml

CHANGES

CONTRIBUTING

Configurations/00-base-templates.conf

Configurations/10-main.conf

Configurations/15-android.conf

Configurations/50-win-onecore.conf

Configurations/README

Configurations/README.design

Configurations/descrip.mms.tmpl

Configurations/dist.conf

Configurations/unix-Makefile.tmpl

Configurations/windows-makefile.tmpl

Configure