Modify schema to be ag instead of public
Add survey structure
Set search path in SQLConnectionHandler init
Use SQLConnectionHandler obj to interact with DB

Fixes #152
Merge pull request #157 from adamrp/issue-152-new-schema

Issue 152 new schema
add more sitebase
Merge branch 'ngnix-1' of https://github.com/antgonza/american-gut-web into ngnix-1