Edited de_DE.po - encoding of german Umlauts

Edited de_DE.po from timm@dertimm.de - the encoding of german Umlauts was not correct. Now the Umlauts are written in html-code
Merge branch 'develop' of https://github.com/stdt/make into stdt-develop

Conflicts:
	src/languages/de_DE.po
Merge branch 'stdt-develop' into develop
Update de_DE.mo
Update changelog.
Version 1.0.7.
Merge branch 'release-1.0.7' into develop