Added --webtex option for HTML math.

+ Added --webtex command-line option, with optional parameter.
  (Defaults to using google charts API.)
+ Added WebTeX HTMLMathMethod.
+ Removed MimeTeX HTMLMathMethod.  (WebTeX is generic and subsumes it.)
+ Modified --mimetex option to use WebTeX.
+ Thanks to lpeterse for the idea and some of the code.

1 files changed, 4 insertions, 2 deletions

diff --git a/tests/writer.html b/tests/writer.html
index b8296a536..adf0bb9ca 100644
--- a/tests/writer.html
+++ b/tests/writer.html
@@ -855,9 +855,11 @@ Blah
 	></span
       >-Tree</li
     ><li
-    >Here’s some display math: <span class="math"
+    >Here’s some display math: <br
+       /><span class="math"
       >$\frac{d}{dx}f(x)=\lim_{h\to 0}\frac{f(x+h)-f(x)}{h}$</span
-      ></li
+      ><br
+       /></li
     ><li
     >Here’s one that has a line break in it: <span class="math"
       >α + ω × <em