Making the calendar easier on the eye.

Right now is really hard to actually see the calendar borders

Currently it looks like this:
![Before](https://img.skitch.com/20120309-m42hjrf9ebwx33kudaap5mafp1.jpg)


The proposed change is:
![After](https://img.skitch.com/20120309-8g61ji1s58q6hb215puk4c51su.jpg)

Not really sure about the sass, never touch sass before and I did this on the fly.