OpenStack usage plugin
Tests for OpenStack plugin
Separate get_ventures functions
Merge branch 'master' of https://github.com/allegro/ralph_pricing into OpenStack
Fix tests
Modify DailyUsage data
Major changes in handling OPENSTACK_REGIONS
Merge branch 'master' of https://github.com/allegro/ralph_pricing into OpenStack

Conflicts:
	src/ralph_pricing/models.py
Typo and small changes
Merge pull request #15 from quamilek/OpenStack

Add a plugin for synchronizing Ventures OpenStack usage