Performance improvement for challenges api.
Merge pull request #152 from Ghost141/master

Performance improvement for challenges api.
Fix the issue that all contents are putting together in one paragraph in registrattion notification email.
User Profile API Update
Merge pull request #156 from LazyChild/develop

Fix for the force refresh issue.
Fixed callback.
Merge pull request #157 from LazyChild/develop

Fix for force refresh.
Performance improvement for challenges api.
Merge pull request #154 from bugbuka/master

Fix the issue that all contents are putting together in one paragraph in...
Merge Public User Profile API and My Profile API
Revert the change in test.challenges.js
Merge pull request #158 from Ghost141/master

Performance improvement for challenges api.
Get Docusign Recipent View URL API
Merge Get Docusign Recipient View URL API
Add Timezones API
Add custom select flag in studio.
Change the download link.
Merge remote-tracking branch 'origin/develop' into develop