add user contribution count
Add RecentActivity
Change the name recent_activity to recent_contribution
Add readme for recent contributions
Merge pull request #43 from viki-org/contribution_count

add user contribution count
Merge pull request #44 from viki-org/feature/recent_activity

Add RecentContribution
1.9.10 release
Merge branch 'master' of github.com:viki-org/viki-api-gem into feature/recent_activity
Merge branch 'master' into remove_stripe_refactoring
Prepare for 2.0.0