Fixed German locale file
Several date formats used the US English MM/DD/YYYY format instead of the German DD. MM. YYYY format.
Added English GB file with strings for Agenda view.
Formated DateRange widget tighter to save space.
Added English GB locale file.
Merge remote-tracking branch 'refs/remotes/origin/extensible-bug-fixed-german-locale-file'
Merge remote-tracking branch 'refs/remotes/origin/extensible-feature-english-GB-locale'
Merge remote-tracking branch 'refs/remotes/origin/teamup-override-1-daterange-formatting'

Conflicts:
	src/form/field/DateRange.js
Merge remote-tracking branch 'refs/remotes/origin/teamup-override-2-english-GB-file'

Conflicts:
	src/locale/extensible-lang-en_GB.js