Commit inventory

Fixed some bugs
Equip Weapon in inventory
Commit inventory v2
Commit inventory v3
Commit inventoy v4
Merge branch 'devel_d' of https://github.com/eloipuertas/ES2014A into devel_d

Conflicts:
	Nightrain/Assets/Resources/HealthBar/Materials/bar_health.mat
	Nightrain/Assets/Resources/NPC/Materials/NPCbar_health.mat
	Nightrain/Assets/Scripts/NPC/Movement.cs
	Nightrain/Assets/Scripts/NPC/NPCAttributes.cs
	Nightrain/Assets/Scripts/NPC/NPCAttributes.cs.meta