Added "assets" field to licence
Flaked
Corrected the grid
Applied corrections from old branch
Spurious import
Corrected the licence grid
Adding licences in asset form
licences field no longer required
Corrections for unit tests
Prepare to correct migrations
Added db migration and corrected bad merge
Corrections from PR
Flaked
Merge pull request #133 from zefciu/RBM-38

Assigning licences to assets
Possibility of generating a report invoice from the search results
Update views.py
Merge pull request #137 from quamilek/report-invoice

Possibility of generating a report invoice from the search results
Added "assets" field to licence
Added delete button
Deleting licence implemented