Added transforms for furniture and nav goals

So the coordinates of the items should be defined here instead of inside of the macro itself. You can then use `<xacro:insert_block name="origin" />` inside of the macro. (e.g., https://github.com/WPI-RAIL/rail_collada_models/pull/7/files#diff-88e2f9e11fd7e46768116c372136c0d1L5)