Merge pull request #219 from mkurek/feature/ralph-scrooge

ralph_pricing renamed to ralph_scrooge
Merge pull request #221 from mkurek/feature/service-models

pricing object and service models; models moved to separated files
Merge pull request #223 from mkurek/feature/service-history

Feature/service history
fixed coveralls and travis badges
Merge pull request #224 from mkurek/fix/services-travis-coveralls

fixed coveralls and travis badges
fixed admin
updated travis config
Merge pull request #227 from mkurek/feature/services-gui

fixed admin
Merge with services

- In progress
Asset collect plugin to service
remove needless file
fixed flake
Merge pull request #230 from mkurek/feature/services-gui

fixed flake
docstrings
Merge branch 'services' into feature/upgrade-plugins
Fix flake8
Fix notics
fix travis
comma
Merge pull request #229 from kula1922/feature/upgrade-plugins

Feature/upgrade plugins