gtRecDefaultParameters : method default value set to '3DART' (it works better than '2DFBP')

Signed-off-by: Laura Nervo <laura.nervo@esrf.fr>

5_reconstruction/gtRecDefaultParameters.m

 function par_rec = gtRecDefaultParameters()
 
-par_rec.method         = '2DFBP'; % can be '3DART' or '2DFBP'
+par_rec.method         = '3DART'; % can be '3DART' or '2DFBP'
 par_rec.list           = [];
 par_rec.percentile1    = 25;
 par_rec.percentile2    = 20;