HRU-DELIN

In this version new functionalities have been created :
- deal with irrigation map (cf Rapport_MDR_2016_final.pdf)

Small bugs have also been corrected
- aspect calculation for NORTH (in hru-delin_parms_J2000.py)
- syntax of the reclass_default_rules_dem file (supression of "thru")

The v4 version is deployed on penelope.