Removing unwated alters & drops

using DROP DATABASE to remove old content
Adding Query methods to Group data mapper

* adding get_all() to get all groups for a user
* adding get() to get a group by id
* adding / modifying test classes
Modifying status label's source
Adding route to get all groups for user

Need to integrate the route's response with a generic response wrapper
Adding uuid to string conversion for model methods

stringifying the uuid fields for easier response handling
Adding test for get post by ID
Adding method to get Post by ID
Changing case of email param to lower case

Changing case of email param to lower case before further processing
Adding destructor method to Data Mappers

closing db connection on data mapper destroy method