Merge pull request #180 from bepetersn/v2.0-dev

V2.0 dev -- postgresql db support added, production mode re-added, misc.
Changes to support deployment history
Merge branch 'v2.0-dev' of https://github.com/sc3/cookcountyjail into v2.0-dev
Added displaying all deployed versions.
Merge pull request #181 from nwinklareth/v2.0-dev

Added displaying all deployed versions
Added -dev to version id to signal this API has not been released.
Merge pull request #182 from nwinklareth/v2.0-dev

Added -dev to version id to signal this API has not been released.
script to test connection to DB added
db_test script converted to nose test