Fix padding in today box in month view

It looks like a specific padding is applied on the current day in the month view, what causes the number to be positioned higher than the other numbers. The font weight of the day number should also be increased to be analog with the designs.

![screen shot 2014-12-02 at 16 20 45](https://cloud.githubusercontent.com/assets/2194396/5266065/37902a0a-7a3f-11e4-83e8-6335e179ce7f.png)