services api(view, url and serializer) (NC-155)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-155
services tests (NC-155)
services docs (NC-155)
Fix service documentation
Add filtering for service list

- NC-155
Merge branch 'feature/nc-155' into 'develop'

Feature/nc 155

Issue for haystack implementation: https://opennode.atlassian.net/browse/NC-167