added base chat client files
adding gui files
starting login portion of command line client
Create README.md

change this file as needed
moved login and message loops to their own functions, login is still
not finished

UI version of client is most likely broken, don't use it for now
added login functionality to client and server, server is hardcoded to verify user, change this when we add database
Merge pull request #1 from COMP7081-Group5/callum

Callum
removed gson include
Merge branch 'master' of https://github.com/COMP7081-Group5/chatClient
uncommented client login function, adding database imports to server.java
add fucntion that admin can add a new user.