Basic UI: Clear http return data

If the data isn't manually cleared it will accumulate, and cause json
errors if update check/log return is queried more than once
Basic UI: Fix formatting
Basic UI: Remove debug logging of update reply
Fix typo in log upload
Add latest translations from CrowdIn
Add corrections to German
Merge pull request #259 from dodgepong/latest-crowdin-translations

Add latest translations from CrowdIn
Use more appropriate error message

Sometimes certain drivers do not have the capability required to
initialize the graphics subsystem (mesa currently, for example).
Instead of saying "your hardware is too old", state that the drivers may
also be at fault.
Update to 0.5.0
Add debian packaging files