Small bugfixes around Taper utils.

Signed-off-by: Stefan Schmiederer <sschmied@esrf.fr>

zUtil_Python/gtPythonCommand.m

 function [status, msg, ver] = gtPythonCommand(args, use_fable, use_exec)
 % GTPYTHONCOMMAND  Calls python with the proper command
 %
+%                  If your python script can't be found although it should
+%                  be known by the system, try full path and remove trailing 
+%                  newline char:
+%
+%                  [~, path_to_cmd] = system('which script.py');
+%                  path_to_cmd = path_to_cmd(1:end-1);
+%
+%
 %     [status, msg, ver] = gtPythonCommand(args, [use_fable], [use_exec])
 %     -------------------------------------------------------------------
 %     INPUT:

zUtil_Taper/gtTaperReadMapFile.m

-function grain = gtTaperReadMapFile(pathtofiles,map_file,detector_par)
+function grain = gtTaperReadMapFile(pathtofiles, map_file, detector_par)
 % grain = gtTaperReadMapFile(pathtofiles,map_file,detector_par)
 
 if ~exist(pathtofiles,'dir') || isempty(pathtofiles)
@@ -9,7 +9,7 @@ if ~exist(fullfile(pathtofiles,map_file),'file')
     disp(['file ' map_file ' does not exist...'])
     return
 end
-if ~exist(fullfile(pathtofiles,detector_par),'file')
+if ~exist(fullfile(pathtofiles, detector_par),'file')
     disp(['file ' detector_par ' does not exist...'])
     return
 end
@@ -23,11 +23,18 @@ output_gff = [map_file(1:end-4) '.gff'];
 % ... U11  U12  U13  U21  U22  U23  U31  U32  U33
 % ... eps11  eps22  eps33  eps23  eps13  eps12
 
+% somehow unix command doesn't search system folders???
+[~, pcmd] = system('which ubi_to_gff.py');
+% unix command adds newline char. Why???
+pcmd = pcmd(1:end-1);
+disp(pcmd)
 cdir = pwd;
 cd(pathtofiles);
 
-cmd=['ubi_to_gff.py ' map_file ' ' detector_par ' ' output_gff];
-[~,msg]=gtPythonCommand(cmd, true); disp(msg)
+cmd = [pcmd ' ' map_file ' ' detector_par ' ' output_gff];
+disp(cmd)
+[~,msg] = gtPythonCommand(cmd, true, true);
+disp(msg)
 
 fid = fopen(output_gff);
 C = textscan(fid, '%*d %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f','Headerlines',1);