Multiattach, part 1

Conflicts:

	OpenSim/Framework/AvatarAppearance.cs
	OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
	OpenSim/Region/CoreModules/Avatar/Attachments/Tests/AttachmentsModuleTests.cs
	OpenSim/Region/Framework/Interfaces/IAttachmentsModule.cs
	OpenSim/Region/Framework/Scenes/Scene.cs
	OpenSim/Region/OptionalModules/Avatar/Attachments/TempAttachmentsModule.cs
	OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
Multiattach, part 2
Limit each attachment point to 5 items as per spec
Merge commit 'ccd6f443e1092cb410f565e921f7cf4dd8cd2dac' into newmultiattach

Conflicts:
	OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
Merge branch 'master' into newmultiattach

Conflicts:
	OpenSim/Region/CoreModules/Avatar/Attachments/AttachmentsModule.cs
Fix tests for multiattach