#24916 - New Shotgun Logo in Std Toolkit Toolbar

This changes the logo in our std toolbar from the TK logo to the SG logo:

![screen shot 2014-03-27 at 12 00 38](https://cloud.githubusercontent.com/assets/337710/2536913/7b362f32-b5a7-11e3-8626-39b32dccbec7.png)