--Corridor class
-add boolean in corridor constructor
-implementation of turnLightOn()

--LectureItem & LabItem
-add method equals

--Item
-add constructor with 3 parameters

--Student
-add methode incrementEnergy
-add methode decrementEnergy
-add alreadyListened(Item item)
Merge pull request #1 from mathieumoli/moli

--Corridor class