[Matrix] some cleanups

[AlwinEsch]

That I bring this request has primarily to do with Azure Test, somehow it no longer runs at https://github.com/xbmc.

This cleanup some part on the addons:

Commit 1:

add asserts for icon and remove nofanart on addon.xml This related to add asserts for icon and remove nofanart on addon.xml

Commit 2:

update addon.xml text language set

As standard this now lang="en_GB" for Kodi

Commit 3:

update language folder from English to resource.language.en_gb

Also here kodi have now the resource.language.en_gb as standard and the old has only worked with fallback.

Commit 4:

update transifex set on strings.po

To have them on right links and with correct language for Transifex

Commit 5:

update .gitignore

To have equal with other addons and to prevent much not wanted parts.

Commit 6:

update debian build

Then equal to others and better to test with https://github.com/xbmc/xbmc/blob/master/xbmc/addons/kodi-addon-dev-kit/tools/debian-addon-package-test.sh

[AlwinEsch]

About Azure was a bug brought in, found this related to them:

• https://github.com/hdmf-dev/hdmf/pull/313
• https://developercommunity.visualstudio.com/content/problem/947762/github-pull-request-not-triggering-azure-pipelines.html

[AlwinEsch]

Added two other commits, the first about https://github.com/kodi-pvr/pvr.hts/issues/441 and to have visible on html git tabs. The second add also the URL and license name to addon.xml, to have on webview.

About Azure problem, them fixed and hack commit removed.