create base plugin classes and register decorator for plugin classes
plugin based on class fixed; power consumpion tests updated
service model and connected
services models improved
universal plugins for services and usages
tests for universal plugins improvement
more tests for usage plugin; fixed tests for ventures report
docstrings and pep8 improvements
merge with allegro/ralph_pricing/develop
remove tmp files
removed pdb
merge from allegro/ralph_pricing/develop
fixed import AttributeDict in ventures report
flake8 fixes
Added service ventures multichoice field to service form
improvements after review
adding ventures to service in admin fixed
travis ralph config fixed
fixed urls in extra costs and usage prices forms
Merge pull request #110 from mkurek/feature/universal-plugins

Feature/universal plugins and services