Add a few misc notes; try to fix accidental inline Mathjax

layouts/partials/mathjax_support.html

@@ -5,7 +5,8 @@
 <script type="text/x-mathjax-config">
 MathJax.Hub.Config({
   tex2jax: {
-    inlineMath: [['$','$'], ['\\(','\\)']],
+    // Dollar signs are too annoying.
+    inlineMath: [/*['$','$'], */['\\(','\\)']],
     displayMath: [['$$','$$'], ['\[','\]']],
     processEscapes: true,
     processEnvironments: true,