Changed the default color of EditText border to a light grey

Changed the default color of EditText to #ccc, which is a light grey. It is the same color Twitter Bootstrap uses and looks cleaner.

Before: 
![edittext_dark](https://f.cloud.github.com/assets/684942/1652309/ddf29256-5b0b-11e3-8bdb-34db12b4bf2e.jpg)
After: 
![edittext_light](https://f.cloud.github.com/assets/684942/1652294/6cf6b686-5b0b-11e3-92a5-83ef1bca6fb7.jpg)