Add padding to connect button

In 3.2 - the Sass was re-organized and in the process this function was left out:
```
@function em($value, $root: "false") {
    @if $root == "false" {
        @return ($value/$root-font-size * 1em);
    } @else {
        @return ($value/$root * 1em);
    }
}
```
That function converts ems to pixels on compile and uses the variable `$root-font-size` which was also not present in 3.2.  The following code then, was not being compiled correctly:
`padding: em(12px, 21px) em(18px, 21px) em(8px, 21px) em(12px, 21px);`
Which caused this:
![screen shot 2014-10-31 at 11 46 01 am](https://cloud.githubusercontent.com/assets/3220162/4866709/6c8e2e02-612e-11e4-9e1b-52af4d5c31db.png)


This patch just adds em values to fix the padding of the connect button.