Create change email layout
Add add email functionality
Add verify email
claim reward
Show error tip
Remove manual claim reward after verify

- API server takes care of it now
Refactor email settings into seperate controller
Merge branch 'master' into change-email
Remove unused dependencies and rewards.js
Address comments
Support recovery code verify token or HMAC verify token
Merge branch 'master' into change-email
Merge pull request #671 from stellar/change-email

Change email in settings