CloudProjectMembership model added
CloudProjectMembership serialiezer, view and url were corrected
permissions for CloudProjectMembership added
task for tenant creation added
CloudProjectMembership factory
project to cloud connection was corrected in tests
unittests moved to unittests folder (NC-47)
test_project_cloud_membership file created(NC-47)
CloudProjectMembershipView create method (NC-47)
test was corrected, description added to viewset (NC-47)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-47
cloud-project membership creation was updated in iaas tests
unused factory methods were removed (NC-47)
python-keystoneclient==0.11.1 added to setup (NC-47)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-47

Conflicts:
	nodeconductor/cloud/perms.py
merge with develop(NC-47)
task was corrected (NC-47)
tasks tests
CloudProjectMembershipViewSet: call task in post_save(NC-47)
CloudProjectMembership model states corrected (NC-47)