Statistics alpha version
Create logic for create and progress statistics data

- Added DailyStatistics model
- pricing_sync run statistics plugin at the end
- Added method to show statistics from console
Fix flake8

- fix flake8
Fix notics
Remove model and plugin

- Remove DailyStatistics model
- Remove statistics plugi
- Change pricing_statistics
Move warnings limit for usages to settings and app.py

- Move warnings limit for usages to settings and app.py
Remove needless imports

- Remove needless imports
Rename second_date to compare_date

- Rename second_date to compare_date
Merge branch 'develop' into feature/statistics

Conflicts:
	src/ralph_pricing/app.py
Merge pull request #143 from kula1922/feature/statistics

Feature/statistics