* Removes the MathJax heuristics that decides
if equations are centered or left-aligned.
* Introduces the attribute display to specify
if the math element is rendered in inline,
display, or inline-displaystyle.
* add css rules for display / inline math images
Bug: 61051
Change-Id: Iba69903f781f0cb1606b8ddcffb90fb86c9b229b
