Proper symbol rendering in matrices

* fix float type bug in transform routine (Single=float32<>float)
* Increase matrix and vector columns from 5-2 to 7-2
* Render infinity and negative infinity with proper symbols, NaN/missing values with a cross.

![fslab-naninfty](https://cloud.githubusercontent.com/assets/47147/3356647/956cb68e-fac4-11e3-8e15-8e51c50a27aa.png)