Replaces paging toolbar and button images with high contrast versions

Before:
![screen shot 2014-12-01 at 11 21 28 am](https://cloud.githubusercontent.com/assets/186715/5251667/4eed7ec6-794c-11e4-8c95-0b12bc0a0931.png)

After:
![screen shot 2014-12-01 at 11 11 17 am](https://cloud.githubusercontent.com/assets/186715/5251619/d18706c8-794b-11e4-98fa-182fb061acd2.png)