Run / Reset button style changes

* Use 26x26px icons for run buttons
* Change Run Program --> Run
* Use blue for Reset button
* Tweak margins/padding to account for new icon size
* Move Share button styling logic into a shared sheet
* Align share button with gameplay area, remove extra space from "Share" text

![image](https://cloud.githubusercontent.com/assets/206973/2920621/43be3ba4-d6e9-11e3-9226-a81113c231a0.png)

![image](https://cloud.githubusercontent.com/assets/206973/2920623/4ff0516e-d6e9-11e3-9b3d-72da987a4860.png)

![image](https://cloud.githubusercontent.com/assets/206973/2920625/5460adfc-d6e9-11e3-911e-852d8c8cde7e.png)