Added gtImagesc and gtImshow which permute visualized image

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@255 4c865b51-4357-4376-afb4-474e03ccb993

zUtil_Imaging/gtImagesc.m

+function hndl = gtImagesc(image, varargin)
+% GTIMAGESC permutes the image to visualise. Be aware that some constructs don't
+% work:
+%   imagesc(x,y,C) % is NOT handled correctly
+    hndl = imagesc(permute(image, [2,1]), varargin{:});
+end

zUtil_Imaging/gtImshow.m

+function hndl = gtImshow(image, varargin)
+    hndl = imshow(permute(image, [2,1]), varargin{:});
+end