[Travel] Quick fix of a possible bug
Change the module.ymls and plugin.yml

revision -> version in module.ymls
added source-version in plugin.yml and module.ymls
Updated the source files to support source-version
Added source version and link to cubeengine in /version.

fixed a bug with de_DE.json not existing in resources/language/messages
Some minor fixing
minor cleanup
added a missing file header
removed the vaultcompat
Merge branch 'origin/master'
fixed a bunch of bugs which where exposed by totokaka's changes
only execute the shade plugin if needed
enable them modules! Also fixed a bunch of bugs