Add singletron pattern to HallServer
Add getCurrentVersion to DAOFactory
Add singletorn pattern to DAOPosgreSQL class
Implements OrderManagerPanel.java in server
Implements ActionInfoPanelListener.java in server
Implement DatabaseUpdateServer
Merge branch 'master' of git@gitlab.com:cowabunga-team/ar-cowabunga-project.git
Modify OrderManagerPanel.java in server
Merge branch 'master' of git@gitlab.com:cowabunga-team/ar-cowabunga-project.git
Improve DatabaseUpdateServer
Add DrinkPanel.java in Server
Add start and stop methods to Server class
Add listeners to ServerPanel
Improve  stopServer() method on Server class
Merge branch 'master' of git@gitlab.com:cowabunga-team/ar-cowabunga-project.git
Register listener to start and stop buttons on ServerPanel class
Improve Server start/stop methods
Add demodata to test ServerGUI
Modify pompon_red.png resource
Add new ids to listitem_product_final_layout, "" intro_layout,
shopping_cart_layout.xml