This version fixes a number of bugs so that more inline math is converted correctly to MathML.

New Feature: many Wikipedia pages place larger math expressions on their own line inside of a list tag, probably for presentation reasons. However, this causes screen readers to say "list with one item" ... "out of list" for each piece of display math. This extension adds role="presentation" so that AT does not see the math as being a list and just reads the math. The display of the math is unaffected.