Create validation notebook

[gomezzz]

• Small changes to plots
• Added Fig3_2.svg
• Removed deprecated method for converting validation results
• Add sampling altitude as parameter to validation
• Commented out losses not used atm in validation
• Added function to load training run
• Added notebook to run validation on a bunch of results

Closes #87 Closes #86

[darioizzo]

can i merge or its WIP?

[gomezzz]

Can be merged I think