Update links to FSL course data

Author: mcraig-ibme

doc/walkthrough_cl.rst

@@ -5,9 +5,9 @@ OXASL walk through tutorial - command line
 
 This tutorial demonstrates some of the common options available in the OXASL command line tool.
 
-We will be working with multi-PLD data from the 
-`FSL tutorial on Arterial Spin Labelling <https://fsl.fmrib.ox.ac.uk/fslcourse/lectures/practicals/ASLpractical/index.html>`_.
-You will need to download this data before following the tutorial.
+We will be working with single and multi-PLD data from the
+`FSL tutorial on Arterial Spin Labelling <https://open.win.ox.ac.uk/pages/fslcourse/website/advanced_materials.html>`_.
+You will need to download the data from `this link <https://fsl.fmrib.ox.ac.uk/fslcourse/downloads/asl.tar.gz`_ before following the tutorial.
 
 The tutorial has been written so that we start with the most basic analysis and gradually add
 options and show the effect they have on the output, as well as how they are reported in the

doc/walkthrough_gui.rst

@@ -5,8 +5,8 @@ This tutorial demonstrates some of the common options available in the
 OXASL GUI.
 
 We will be working with single and multi-PLD data from the 
-`FSL tutorial on Arterial Spin Labelling <https://fsl.fmrib.ox.ac.uk/fslcourse/lectures/practicals/ASLpractical/index.html>`_.
-You will need to download this data before following the tutorial.
+`FSL tutorial on Arterial Spin Labelling <https://open.win.ox.ac.uk/pages/fslcourse/website/advanced_materials.html>`_.
+You will need to download the data from `this link <https://fsl.fmrib.ox.ac.uk/fslcourse/downloads/asl.tar.gz`_ before following the tutorial.
 
 The tutorial has been written so that we start with the most basic analysis and gradually add
 options and show the effect they have on the output, as well as how they are reported in the