[Matrix] correction release, german language add and debian build update

[AlwinEsch]

Correction release for 2 errors from the previous one:

1. In the last release 1.6.0 was accidentally used instead of 1.5.3
2. The release was too fast for Debian / Ubuntu build and the necessary Kodi version wasn't available, so build on the old version

Further I has added:

• German translation
• To make also debian build with Travis
  • this then report bad Debian if differences in API (this works only if addon also need changes)
• Bit update of debian build code

Releated to https://github.com/xbmc/peripheral.joystick/issues/184

Because of translation, I think we have to get Transifex Fit for our addons again soon, nothing works with them for a long time (addon updates are missing there).