Add data file links; update k-vec titles

Author: briantoby

MDtutorials/TutorialGuide.txt

@@ -25,6 +25,10 @@ The tutorial .md file should start with:
 		 ---
 		 <!--- Don't change the HTML version of this file; edit the .md version -->
 
+		 * Exercise files are found [here](data/index.html)
+
+    ("exercise" line can be omitted when not needed)
+
 * Sections should be labeled with
 
   	   ## Intro

MDtutorials/k_vec_tutorial/k_vec_tutorial.md

@@ -1,8 +1,10 @@
 ---
-title: k-vector searching in GSAS-II
+title: k-vector searching in GSAS-II #1 (all zero vector)
 ---
 <!--- Don't change the HTML version of this file; edit the .md version -->
 
+* Exercise files are found [here](data/index.html)
+
 ***This tutorial was built from the presentation by [Keith Taddei](https://www.anl.gov/profile/keith-taddei) at the [MagStr Workshop](https://conference.sns.gov/event/434/) for magnetic structure solution. The data associated with the tutorial has been published in*** 
 [K. Taddei, *et al.*  Phys. Rev. Mater., 3, 014405 (2019)](https://doi.org/10.1103/PhysRevMaterials.3.014405)
 

MDtutorials/k_vec_tutorial_non_zero/k_vec_tutorial_non_zero.md

@@ -1,15 +1,17 @@
 ---
-title: k-vector searching in GSAS-II (a non-zero case)
+title: k-vector searching in GSAS-II #2 (non-zero k-vector)
 ---
 <!--- Don't change the HTML version of this file; edit the .md version -->
 
+* Exercise files are found [here](data/index.html)
+
 ## Intro
 
 This tutorial was built from the GSAS-II tutorial [Magnetic Structure Analysis-III](https://advancedphotonsource.github.io/GSAS-II-tutorials/Magnetic-III/Magnetic-III.htm). For an introduction about the system under study (Ba${}_6$Co${}_6$ClO${}_15.5$), refer to that tutorial. The current tutorial will focus on the k-vector search capability in GSAS-II, going beyond the trial-and-inspecting approach followed in [Magnetic Structure Analysis-III](https://advancedphotonsource.github.io/GSAS-II-tutorials/Magnetic-III/Magnetic-III.htm). In that tutorial, we ended up using a propagation vector of (0,0,1/2).
 
 ## Read in data & phase
 
-To avoid duplication, one can refer to the `Step-1` and `Step-2` for `exactly the same procedures` of loading in the experimental diffraction data and the configuration file for the nucleus structure.
+To avoid duplication, one can refer to the `Step-1` and `Step-2` in the [k-vector searching in GSAS-II #1](../k_vec_tutorial/k_vec_tutorial.html) for `exactly the same procedures` of loading in the experimental diffraction data and the configuration file for the nucleus structure.
 
 ## Inital refinement 
 
@@ -125,5 +127,5 @@ show how this is interfaced into GSAS-II.
 ----
 | | 
 | ---: |
-| Yuanpeng Zhang & Brian Toby |
+| Yuanpeng Zhang |
 | January 19, 2025 |