Remove WePay from Donate Button

#### Deprecate all WePay functionality

Removes the WePay functionality from the footer Donate link, which fixes alignment problem brought up in #213. Donate button now links to PayPal, but will link to Stripe soon once payments are fully integrated.
![newdonatelink](https://cloud.githubusercontent.com/assets/226228/3464728/c0d36600-0254-11e4-973a-f0180708de47.png)