bugfix, larger maki icons (do not merge yet)

fixes #1160 

I propose to simply scale up the images smaller than a defined min size (currently set to 32px), which renders the maki icons as such: 

![screen shot 2014-11-17 at 12 48 11](https://cloud.githubusercontent.com/assets/978461/5069307/0fc60194-6e59-11e4-88f9-1bcaf02c2a6d.png)