- Now data structs including a given primitive's info (PrimitiveInfo and PrimitiveCreationCommand) keep only one attribute indicating the primitive's file path (One primitive = one file).
- AbstractPrimitivesManager's methods "getPrimitiveAbsolutePath()" and "getPrimitiveRelativePath()" have been removed and replaced by AbstractPrimitivesManager::getFilePath().
- Now primitives to be sent from server to client are copied to a temporary directory, so other commands affecting the primitive don't modify the original primitive file.
	- In an analogous way, primitives received in client are first written to a temporary directory before being moved to their final location.
- UNFINISHED: now primitives will be imported as .prim files. Each .prim file will contain all the information needed by a given primitive (mesh + material + texture -optionally-).