Style text login input fields

Fixes "email address input field is red". [1]

Increases the font-size to 1.3em for inputs.  Previously the email and password font-size was 1.0em and button text was 1.2.

I was having a hard time reading the text on the phone.

- [1] https://www.pivotaltracker.com/story/show/77457262

#### Todo

- [x] @kellierife needs design review

The first image in both previews are the new settings.

#### Previews

##### Email Font Size

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![2014-09-02_10-51-31](https://cloud.githubusercontent.com/assets/466104/4116144/93e9e9d6-3281-11e4-882a-a657a3393d60.png)
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##### Button Font Size

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![2014-09-02_11-03-21](https://cloud.githubusercontent.com/assets/466104/4116154/b697daa6-3281-11e4-84da-4374b376419e.png)
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