MetricInfoCell now aligns content like UITableViewCellStyleValue2 but lets you adjust the width of metricNameLabel

It's a bit hacky but it makes the views a little easier to read by ensuring the name and value labels in MetricInfoCells are aligned.

Eg.

![ios simulator screen shot 27 07 2013 9 01 54 am](https://f.cloud.github.com/assets/525313/865994/8e9eaeb4-f64e-11e2-9554-a21f67d6ab2b.png)