made all fonts TeX-supplied fonts

lib/latex-loader.js

@@ -55,6 +55,7 @@ var options = {
     // The SVG contains values in "pt" units, but to maximise legibility we convert
     // these to "rem" instead, so that formulae are always sized based on the font
     // around them, rather than being sized independently of the document text.
+    // Base browser sizes are 16pt so pt2rem "should" be 4/3 but 1.4 spaces better.
     var pt2rem = 1.4;
     w *= pt2rem;
     h *= pt2rem;