Update the MATLAB example scripts so that they download the files.

All automatic!
Thank you Curtis.

scripts/ExampleScript_MATLABImportROIs.m

@@ -16,10 +16,19 @@
 clear 
 clc
 
-% Where are the files?
-root_folder = '/Users/tinevez/Google Drive/TrackMate/Applications/MATLABimport/';
+% Where to store the files?
+root_folder = '.';
 % TrackMate file.
 file_path = fullfile( root_folder, 'MAX_Merged.xml' );
+if ~exist( file_path, 'file' )
+    % Download and uncompress the files.
+    url = 'https://samples.fiji.sc/tutorials/MATLABtuto.zip';
+    zip_file_path = fullfile( root_folder, 'MATLABtuto.zip' );
+    fprintf( 'Downloading tutorial files from %s\n', url )
+    websave( zip_file_path, url );
+    fprintf( 'Saved to %s\n', zip_file_path )
+    unzip( zip_file_path, root_folder )
+end
 
 % Read tracks.
 [S, idmap, rois] = trackmateSpots( file_path );

scripts/ExampleScript_MATLABPlotTracksWithROIs.m

@@ -16,13 +16,24 @@
 clear 
 clc
 
-% Where are the files?
-root_folder = '/Users/tinevez/Google Drive/TrackMate/Applications/MATLABimport/';
+% Where to store the files?
+root_folder = '.';
 % Image file.
 movie_path = fullfile( root_folder, 'MAX_Merged-1.tif' );
 % TrackMate file.
 file_path = fullfile( root_folder, 'MAX_Merged.xml' );
 
+if ~exist( file_path, 'file' ) || ~exist( movie_path, 'file' )
+    % Download and uncompress the files.
+    url = 'https://samples.fiji.sc/tutorials/MATLABtuto.zip';
+    zip_file_path = fullfile( root_folder, 'MATLABtuto.zip' );
+    fprintf( 'Downloading tutorial files from %s\n', url )
+    websave( zip_file_path, url );
+    fprintf( 'Saved to %s\n', zip_file_path )
+    unzip( zip_file_path, root_folder )
+end
+
+
 %% Read the movie file.
 
 % You can change the image used in this tutorial, but it must be a