Revisions / Corrections to Without the Hot Air

[rufuspollock]

Can start with: https://www.carboncommentary.com/blog/2017/3/30/l6qcqgoedse1wmjjz87t09usoq6jva

Tasks

• Fork source to e.g. /v2/ (?? - or do we want to go for patches for now?) (at very least incrementally patch since we are still correcting the raw source markdown formatting)
• Implement some trial revisions e.g. https://www.carboncommentary.com/blog/2017/3/30/l6qcqgoedse1wmjjz87t09usoq6jva
• Particularly discuss solar (as key, has changed a lot and mackay punted on it a bit)