intallation done
Tab opened
Add TabEventManager logic and ListenerAggregate functionnality
Add Cache functionnalities
Add OrderedFood & OrderedDrinks
Add MarkFoodServed & MarkDrinksServed
Add FoodPrepared, FoodServed, DrinksServed for tab & staff
Move entities to Entity\OpenTabs and Entity\TabStory
Move Chef Todo List completed
Move Start Closing tab
Add Readme
Merge github/master

Conflicts:
	README.md