Properly handle the width of math and mtd elements by explicitly setting the width from the child mrow (works around FF bug that gets these widths wrong).  Resolves issue #558.
Add some comments, and clear the list of DOM elements once we are done with it.
Add config option for matching font heights in NativeMML and HTML-CSS output (can't do it for SVG, since we aren't using native fonts)
Add a loop to check for font changes due to web fonts either in the math or the surrounding font.  Resolves issue #558.
Add support for matching web fonts in HTML-CSS.  Change the names of the paramters that control it in NativeMML (so both have the same names).  Add a global matchWebFonts option to control whether to do the loop to check for web fonts (off by default).  Resolves more of issue #558.
Remove debugging message
Make web font loop into an extension (first draft)
Add the MatchWebFonts.js extension file
Mark the postTranslate call that does chunk updates as a partial one
Merge pull request #598 from dpvc/issue558-loop

Improve width computation for MathML elements (issue #558)