tree 99f5cc4277409af1d12345d3514da8a3cc1422ff
parent 2450500346459ec95d8b1670f07ba92772a6f416
author Han Seoul-Oh <laughinghan@gmail.com> 1459907020 -0700
committer Han Seoul-Oh <laughinghan@gmail.com> 1459907020 -0700

Increase size of sum (uppercase Sigma), prod, etc

The existing sum visual test case looks closer to KaTeX and MathJax,
see GitHub commit comment (copied below).

Before:
<img width="60" alt="before" src="https://cloud.githubusercontent.com/assets/225809/14303182/4aafeb52-fb5d-11e5-9698-872fdc6b0f87.png">

After:
<img width="64" alt="after" src="https://cloud.githubusercontent.com/assets/225809/14303181/4aaedd16-fb5d-11e5-91cc-a6f3e7395440.png">

KaTeX:
<img width="83" alt="katex" src="https://cloud.githubusercontent.com/assets/225809/14303180/4aadea32-fb5d-11e5-8921-e1f2a920d02c.png">

[MathJax](http://mathb.in/55041):
<img width="71" alt="mathjax" src="https://cloud.githubusercontent.com/assets/225809/14303179/4aadb846-fb5d-11e5-8041-e7e50a6f32d4.png">