Added possible for get more virtual usages then one

- Move cailometer plugin
- Modified collects virtual plugi for getting more usages
Move cailometer tests and added tests for collets virtual plugin

- Move cailometer plugin tests
- Added collets virtual plugin
Created plugin for collets internet usages per IP

- collects internet usages per ip from nfsen server
Gets ventures per ips from ralph and create imprints

- Gets list of ventures per ips from ralph
- Create imprints
Fix flake8

- Fix flake8
Added tests

- Added tests
Fix tests

- Fix tests
service usages push api
fixed assets usage types, improved collect summary text
missing comma
docstrings added
check only for active ventures
scrooge is going white!
Added empty VIRTUAL_VENTURE_NAMES to app.py

- Added empty VIRTUAL_VENTURE_NAMES to app.py
Merge branch 'develop' into feature/add-xenservers

Conflicts:
	src/ralph_pricing/app.py
	src/ralph_pricing/plugins/collects/virtual.py
Fix tests and merge with develop

- Fix tests
added django-bob from vcs to travis config
Merge pull request #112 from kula1922/feature/add-xenservers

Added possible for get more virtual usages then one
merge
add bob-ajax-select from vcs to travis config