Add more Embedded Generation Data

[BenjaminWatts]

At present, there is solar and wind data for the 4 National Grid Distribution Areas (South West, South Wales, East and West Midlands.

An approach to include wind and solar data for other DNOs should be considered either:

a) From the Sheffield Solar API
b) From (as yet undiscovered) National Grid data - e.g. the Carbon Intensity API
c) From other DNO websites - which are not necesarilly consistent.