Clone elements when copying a survey
Merge pull request #202 from CruGlobal/MH-775

Clone elements when copying a survey
Change before_migrate to before_symlink
Merge branch 'master' of github.com:CruGlobal/missionhub
Use aws redis file
Add change language in survey mode, added multiple languages
Merge pull request #237 from CruGlobal/MH-793

Add change language in survey mode, added multiple languages