fixed tests + removed slots field
Add Regions to Asset model
better error message when env is now owned by service
added select_related
Change .travis.yml file to install from feature/regions branch
Update region field for existing Asset objects
added region field with tests + fixed existing tests
Add filter Asset objects by user region - add regionalized model manager
Remove pront from middleware
Merge remote-tracking branch 'tymek/feature/regions' into feature/regions
Fix - get user wfrom wsgi request
Add Service and Device Environment to REST API
Change resources link
Merge pull request #470 from quamilek/hotfix/api-environment-service

Add Service and Device Environment to REST API
Merge pull request #471 from xliiv/valid-env-field

Check if environment belongs to related.
Merge pull request #464 from quamilek/feature/regions

Add Regions to Asset model
fixed asset mro + replaces admin_objects with objects
Merge pull request #472 from xliiv/feature/regions

fixed asset mro + replaces admin_objects with objects
changed asset factories to include default region
Merge branch 'develop' into release/2.3.0

Conflicts:
	src/ralph_assets/tests/functional/tests_view.py