Draft: Resolve "Analytics dashboard: list of users by reputation gain"

Closes #29

added answers-ewi label

requested review from @taicoaerts

assigned to @amanolache

mentioned in issue #11

added 2 commits

• 251faef2 - WIP (unoptimized) calculate reputation in a past timeframe
• 711e3650 - Fix linter

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changed target branch from transact-develop to eip-develop

added 454 commits

• 711e3650...8e384689 - 453 commits from branch eip-develop
• 18e0e69a - Merge branch 'eip-develop' into 29-analytics-dashboard-list-of-users-by-reputation-gain

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TODO: Optimize queries