Rewrite StudyConsentController to use the new AdminController.
User constants for status codes.
Merge pull request #185 from eric-wu/uat

Make StudyConsentController to use the new AdminController
Adding pd-staging.sagebridge.org to the study host names
Merge pull request #184 from alxdarksage/surveys

Surveys
Merge uat back to develop.
Merge uat back to develop.
Changed redis keys to be namespaced by username and environment.
Merge pull request #187 from SartoriusEarth/develop

Changed redis keys to be namespaced by username and environment.
changed name of environment variable for redis key to ENV_NAME.
Merge pull request #188 from SartoriusEarth/develop

changed name of environment variable for redis key to ENV_NAME.
Updating survey attributes
fixed health data tab on web page so that the date string conversion no longer negatively affects dygraph. Also fixed the consent process to not break anymore.
forgot to commit js files.
removed some unnecessary changes to files.
Survey controller/service
Merge pull request #189 from SartoriusEarth/develop

Fixed health data tab and consent process on front end
Merging
Merge pull request #190 from alxdarksage/survey-controller

Survey controller
Refactoring