`gdx`, `gdy`, `gdz` are not exactly "space increments in estimation space"

[abukaj]

According to:

kCSD-python/kcsd/KCSD.py

Lines 473 to 474 in 2ce755a

	nx = (self.xmax - self.xmin)/self.gdx
	self.estm_x = np.mgrid[self.xmin:self.xmax:np.complex(0, nx)]

kCSD-python/kcsd/KCSD.py

Lines 637 to 640 in 2ce755a

	nx = (self.xmax - self.xmin)/self.gdx
	ny = (self.ymax - self.ymin)/self.gdy
	self.estm_pos = np.mgrid[self.xmin:self.xmax:np.complex(0, nx),
	self.ymin:self.ymax:np.complex(0, ny)]

kCSD-python/kcsd/KCSD.py

Lines 929 to 935 in 2ce755a

	nx = (self.xmax - self.xmin)/self.gdx
	ny = (self.ymax - self.ymin)/self.gdy
	nz = (self.zmax - self.zmin)/self.gdz
	self.estm_pos = np.mgrid[self.xmin:self.xmax:np.complex(0, nx),
	self.ymin:self.ymax:np.complex(0, ny),
	self.zmin:self.zmax:np.complex(0, nz)]

the actual increments are (xmax - xmin) / (nx - 1) and so.