2.2.0: Simplified Pasta and multiple file bugfix

• Added "simplified" Pasta subtype with various consolidations:
  • no pluvials (Xxp)
  • no thermal subtypes (Xxa, Xxb, Xxc)
  • combined barren (XG) with marginal (XF)
  • trop rainforest (TXr) with forest (TXf)
  • peritropical moist savanna (XTs) with forest (XTf)
  • submediterranena (XM) with mediterranean (XAM)
• Added Estimate_rad function, which estimates local irradiation from latitude and orbital parameters; no real use in script by default but it'll be easier for me in the future to have it available
• Bugfix that should make inputting multiple files by command line more reliable