Handle nested <math> elements without error.  Resolves issue #614.
Add phasorangle notation to menclosed.  Resolves issue#561.
Fixed default value for mo@symmetric.  Resolves issue #469.
Put checking for screenX into try...catch for IE8 (grr).  Resolves issue #348.
Treat initial <mo> of split and multline (and other related environments) as infix (but remove initial space).  Not sure this exactly matches LaTeX, but is closer than current behavior.  Resolves issue #389.
Make routine to skip initial spaces, and have it also skip empty braces.  Issue #389.
Add \texttt and \textsf macros, and make them work with mtextFontInherit.  Resolves issue #459.
Merge branch 'issue614' into develop.  Issue #614.
Merge branch 'issue561' into develop.  Issue #561.
Merge branch 'issue469' into develop.  Issue #469.
Merge branch 'issue348' into develop.  Issue #348.
Remove unneeded space in class name.
Merge branch 'issue459' into develop.  Issue #459.
Correct condition for skipping empty braces.
Merge branch 'issue389' into develop.  Issue #389.