Add hover styling on project/fundraiser cards

Fix #38

Both the fundraiser and project card have a shadow on hover and a padding of 15px instead of 2px. The fundraiser card's background also changes to white on hover.

Fundraiser card on hover:
![hover_1](https://f.cloud.github.com/assets/884582/1026081/833607f4-0e57-11e3-83fd-79798938e9c6.png)
Project card on hover:
![hover_2](https://f.cloud.github.com/assets/884582/1026082/86c1b620-0e57-11e3-94c7-7abd97551fb0.png)