Use framework build of python to run GUI - required for OSX and provi…

…ded by FSLPYTHON on other platforms

asl_gui_fsl

@@ -1,4 +1,4 @@
-#!/usr/bin/env fslpython
+#!/usr/bin/env fslpythonw
 
 # Use modules in the same dir as wrapper script if present, then default
 # to FSL modules