Update version number
Use correct import
Update .pot to match new syntax
Adapt icon to fontawesome
Add models description
Rename field external id to new syntax <model>__<field>
* [FIX] database_cleanup: Isolate build
* Isolate `database_cleanup` into its own build in Travis file to fix#689
* [FIX] database_cleanup: Remove KeyError assertion
* Remove KeyError assertion in tests due to PR in comment being merged
[FIX] database_cleanup reloads the registry
which has weird side effects during testing. Take care
database_cleanup's tests don't mess up the following tests