Tuned up puppet modules

 * Added db_user class for postgres users
 * Added credentials.example.pp to config module to store
   unix application user password
 * Added postgres-contrib, pip, and psycopg2 packages
 * Moved deployment script into a dedicated deploy module
 * Updated landingzone module to use 'go install'
Initial work on query code for API
Merge branch 'master' of github.com:/seadsystem/Backend
Merge branch 'master' of github.com:/seadsystem/Backend
Merge branch 'master' of github.com:/seadsystem/Backend
Added crosstab queries to API code, still need to cast
unix timestamps to postgres timestamps and verify