Built and implemented Create Group scenario, both client and server
(database, php, json, android codes). Groups are created, just needs to
request users to be added now. Additionally, retouched the UI in several
ways, including the table for added group members. User profile remains
a mess. That's due to its chosen layouts. The activities not worked on
yet have also been left be.
Merge pull request #37 from SageMantis/HEAD

Built and implemented Create Group scenario, both client and server