v1.1

Includes some updates:

in astro.py

• addition of the Stockwell-Pilgrim (1904) solution: StockwellPilgrim1904()

in inso.py

• correction of an error in inso_radians(h,lon,phi,eps,e,per)
• addition of the new function inso_radians_integ(h1,h2,lon,phi,eps,e,per)
  computes the (dimensionless) integral of instantaneous insolation between hours h1 and h2

in minmax.py

• fixing some crash problems in lbd_minmaxH(e,eps,per,critPoints)
• addition of new functions
  • inso_caloric_threshold(lat,ecc,eps,pre):
    return the insolation value "thresh" above which the insolation is half of the year
  • integrated_inso_below(thresh,lat,ecc,eps,pre)
    the symmetric of the already existing function integrated_inso_above(thresh,lat,ecc,eps,pre)
  • inso_caloric_summer(lat,ecc,eps,pre)
  • inso_caloric_winter(lat,ecc,eps,pre)
    the caloric seasons defined by Milankovitch, valid a priori for all configurations