Updated norwegian plant with new NVE data. ID for Norwegian plants HA…

…S CHANGED.

Changed and updated.

- Removed non-hydro plants in Albania
- Updated Albanian plants
- Added missing Slovakian plants

Small changes.

- Added constraints property on the datapackage JSON file
- Removed duplicate IDs (thanks to @gperonato)
- Small edits for Bulgarian plants

New release, small updates (name fixing, updating capacities or coord…

…inates). New plants in Kosovo and in France.

Removed duplicate ids (thanks Antoine Dubois)

Delete map-location-v4.png

Update jrc-hydro-power-plant-database.csv

Update to version 3

Version 2

Update README.md