Added second level, mobs on places and a boss
Merge branch 'master' of https://github.com/penjurov/TeamGeorgeOrwell

Conflicts:
	RPG/RPG/RPG/Objects/MeleUnits.cs
	RPG/RPG/RPG/Objects/RangedUnits.cs
	RPG/RPG/RPG/RPG.cs
	RPG/RPG/RPG/Screens/GameScreen.cs