Unify the default parameters with those required by sources
- Removes instances dict (@colm.talbot, is this okay?)
- Removes obsolete sine-wave parameters
- Rename some parameters for consistency
- Add
latex_label
attribute
@colm.talbot, I've assigned you to look over this as I think you wrote the original code. Please feel free to revert changes or update on this branch til your happy then merge - just so long as the basic tutorial notebook works.