Add i.biomass algorithm

Author: Médéric RIBREUX

python/plugins/processing/algs/grass7/description/i.biomass.txt

@@ -0,0 +1,10 @@
+i.biomass
+Computes biomass growth, precursor of crop yield calculation.
+Imagery (i.*)
+ParameterRaster|fpar|Name of fPAR raster map|False
+ParameterRaster|lightuse_efficiency|Name of light use efficiency raster map (UZB:cotton=1.9)|False
+ParameterRaster|latitude|Name of degree latitude raster map [dd.ddd]|False
+ParameterRaster|dayofyear|Name of Day of Year raster map [1-366]|False
+ParameterRaster|transmissivity_singleway|Name of single-way transmissivity raster map [0.0-1.0]False
+ParameterRaster|water_availability|Value of water availability raster map [0.0-1.0]|False
+OutputRaster|output|Biomass