Analyse user behaviour
User scoreboard (only accessible to administrators)
Added test cases for user scoreboard

Changed name from OpenSpending Data Wrangler to OpenSpending Dataset Maintainers.
Also include users who have zero points as they are interesting as well (exclude system user since that user isn't interesting)
Merge pull request #721 from openspending/720-user-scoreboard

720 user scoreboard
Paginate user list in scoreboard
Merge pull request #722 from openspending/720-user-scoreboard

Paginate user list in scoreboard
Add new translations from Transifex
Add all languages with any translations and include .mo files in the repo (along with supported_langs)