Added AMOptionsTableInsetX option

This option insets the tableview width by the given amount on both sides.  
Includes default value of 0 for backwards compatibility.

Example image attached.
![insettableexample](https://f.cloud.github.com/assets/2762398/1432742/96d306f4-40e3-11e3-86d0-b29498c8101e.png)