#789 SQL script to create new move_requests table in Postgres
#789 Fixed SQL script.
#789 Update CREATE script to use timestamps in utc.
Also CREATE script for a new active_blocks view which will list all blocks from within 12 hours.
#789 Update PostgresDBConnector so that it now writes copies of every block.
Note: At this point in time, it doesn't first check to see if the block already exists.
#789 Rename script so that its name is explicitly clear.
Housekeeping
Merge branch 'develop' into feature/#789_Store_duplicates_of_blocks_to_Postgres
Convert DBConnectorInterface to a class.
Typo
Update methods so that they reference the internal connector instances which have been passed into the class when instantiated.
Update main app module to use the new factory for creating a DBConnectorInterface.
Update main app module to import BBSMSHandler in its own namespace.
Rename DBConnectorInterface module to BBDatabaseAccess.
Update BBNotificationHandler to use new DBConnectorInterface factory.
Rename MongoDBConnector class to MongoConnector so that it is in line with the PostgresConnector class.
Rename PGConnector to PostgresConnector to be in line with MongoConnector.
Import BBDatabaseAccess into its own namespace and update references.
Rename DBConnectorInterface to BBDatabaseAccess.
Add some extra debug log lines.
Add log lines.
Start writing move requests to Postgres as well as Mongo.