Add r.cost algorithms

Author: Médéric RIBREUX

python/plugins/processing/algs/grass7/description/r.cost.coords.txt

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+r.cost
+r.cost.coords - Creates a raster layer of cumulative cost of moving across a raster layer whose cell values represent cost from a list of coordinates.
+Raster (r.*)
+ParameterRaster|input|Unit cost layer|False
+ParameterString|start_coordinates|Coordinates of starting point(s) (a list of E,N)|None|False|False
+ParameterString|stop_coordinates|Coordinates of stopping point(s) (a list of E,N)|None|False|True
+ParameterNumber|max_cost|Maximum cumulative cost|None|None|0.0|True
+ParameterNumber|null_cost|Cost assigned to null cells. By default, null cells are excluded|None|None|None|True
+*ParameterNumber|memory|Maximum memory to be used in MB|0|None|300|True
+*ParameterBoolean|-k|Use the 'Knight's move'; slower, but more accurate|False
+*ParameterBoolean|-n|Keep null values in output raster layer|False
+OutputRaster|output|Cumulative cost
+OutputRaster|nearest|Nearest start points
+OutputRaster|outdir|Movement Directions

python/plugins/processing/algs/grass7/description/r.cost.points.txt

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+r.cost
+r.cost.points - Creates a raster layer of cumulative cost of moving across a raster layer whose cell values represent cost from a vector point layer.
+Raster (r.*)
+ParameterRaster|input|Unit cost layer|False
+ParameterVector|start_points|Start points|0|False
+ParameterVector|stop_points|Stop points|0|True
+ParameterNumber|max_cost|Maximum cumulative cost|None|None|0.0|True
+ParameterNumber|null_cost|Cost assigned to null cells. By default, null cells are excluded|None|None|None|True
+*ParameterNumber|memory|Maximum memory to be used in MB|0|None|300|True
+*ParameterBoolean|-k|Use the 'Knight's move'; slower, but more accurate|False
+*ParameterBoolean|-n|Keep null values in output raster layer|False
+OutputRaster|output|Cumulative cost
+OutputRaster|nearest|Nearest start points
+OutputRaster|outdir|Movement Directions

python/plugins/processing/algs/grass7/description/r.cost.rast.txt

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+r.cost
+r.cost.rast - Creates a raster layer of cumulative cost of moving across a raster layer whose cell values represent cost from a raster of starting points.
+Raster (r.*)
+ParameterRaster|input|Unit cost layer|False
+ParameterRaster|start_raster|Name of starting raster points map (all non-NULL cells are starting points)|False
+ParameterNumber|max_cost|Maximum cumulative cost|None|None|0.0|True
+ParameterNumber|null_cost|Cost assigned to null cells. By default, null cells are excluded|None|None|None|True
+*ParameterNumber|memory|Maximum memory to be used in MB|0|None|300|True
+*ParameterBoolean|-k|Use the 'Knight's move'; slower, but more accurate|False
+*ParameterBoolean|-n|Keep null values in output raster layer|False
+OutputRaster|output|Cumulative cost
+OutputRaster|nearest|Nearest start points
+OutputRaster|outdir|Movement Directions