Increase technology complexity

[kcerva]

Add detailed categories for coal, gas, solar, etc.
Example of categories to include:
'Diesel (centralised)', 'Diesel 1 kW system (decentralised)',
'HFO', 'OCGT', 'CCGT', 'CCGT - CCS', 'Supercritical coal',
'Coal + CCS', 'Hydro (large scale)', 'Hydro (small scale)',
'Hydro (med. scale)', 'Biomass', 'Biomass (CHP small)',
'Biomass CCS', 'Nuclear', 'Geothermal', 'Wind onshore',
'Wind offshore', 'Solar PV (centr.)', 'Solar PV (decentralised)',
'Solar PV with battery', 'Solar CSP', 'Solar CSP with storage'
These need changing material data assumptions.