Dashboard: Top Performers

[bummytime]

Work to be done:

Yosemite Framework

• TopEarnersStats actions (including the implementation within StatsStore)+ tests (Android PR)

Storage Framework

• TopEarnersStats storage logic + tests

Networking Framework

• TopEarnersStats read-only model
• JSON mapper + remote + unit tests

Main App

• Scrollable segmented control component for card header (use the same one as revenue: Dashboard: Revenue and visitors #177)
• Create Today, This Week, This Month, This Year views
• TableView + cell implementation
• Integrate TopEarnersStats + EntityListener with the Dashboard UI
• Pull to refresh logic

Full i6 Mockup:

Part of #14

[bummytime]

Android PR for this feature: woocommerce/woocommerce-android#299