base version of 'add attachment to asset' feature
base version of 'add attachment to asset' feature
added saving multiple files in 'add attachment' form
Merge branch 'asset-attach' of github.com:xliiv/ralph_assets into asset-attach

Conflicts:
	src/ralph_assets/forms.py
	src/ralph_assets/models_assets.py
	src/ralph_assets/views.py
Merge branch 'develop' into asset-attach

Conflicts:
	src/ralph_assets/media/assets/js/base.js
	src/ralph_assets/templates/assets/search_asset.html
	src/ralph_assets/views.py
added working & unclean version of removing attachment
added 'delete from all' & improved look and feel cleanups
added list of assets in 'add-attachments' view
fixed 'in ..' to 'to ..' (deleting assets' attachments info)
Merge branch 'develop' into asset-attach
added 'add new one' button & changed user msg if attachment no longer exists
added adding attachments to licenses
handled TODOS
small code cleanups
maked attachment name link
review remarks included
Merge branch 'develop' into asset-attach
added migration file
flake remarks completed
i18n, more "trans" added