Fixed database config file path in README file
Merge pull request #761 from sdanzig/readme-fix

Fixed database config file path in README file
updated default observer definitions

in order to be compatible with the latest concordia version modified in ac38d0dfc4c16809f7587f8677282806464159f9.
Merge pull request #793 from stevenolen/master

updated default observer definitions
Merge pull request #803 from ohmage/master

merge in db setup changes