Enable alignment shift for text to resolve issues with certain fonts

Certain fonts need a bit of fine tuning. The screenshots show Source Sans Pro

**Before:**
![before](https://cloud.githubusercontent.com/assets/119219/3874279/1a6e755c-213f-11e4-845d-05783f601095.png)
**After**
![after](https://cloud.githubusercontent.com/assets/119219/3874280/1f217cc0-213f-11e4-9254-e64d67202db5.png)