Overall validation

[davide-f]

This issue is to track the overall validation needs. It may be moved into mileston [don't have permissions though]

• [ ] Installed capacity #29
• [ ] Demand
  • [ ] At country level #13
  • [ ] Generation profile in high resolution #28
• [ ] Network #5
• [ ] Generation #11
  • [ ] Generation mix #9
  • [ ] Generation mix at country level #28