Add example of lithium plating for composite electrodes

[brosaplanella]

When writing the release notes I realised there is no example of plating for composite electrodes. This is tricky, especially as additional parameters are required. Having such an example would be very useful.

@DrSOKane, if you have the time to write it that would be great, but otherwise could you post here a source for the parameter values in case someone wants to pick up this issue?