Notices

- css padding bug fix using !important for conflicts when a notice is an immediate child of #maincontent
- soften padding and border-radius to make notices lean and sexy

Before:
![screen shot 2013-08-14 at 4 21 13 pm](https://f.cloud.github.com/assets/446357/965332/a05c096a-0528-11e3-95a2-398363cb2b2c.png)

After:
![screen shot 2013-08-14 at 4 26 36 pm](https://f.cloud.github.com/assets/446357/965334/aadef6e0-0528-11e3-93d0-1ff31ef76425.png)