Sizing fixes

A bunch of small visual tweaks:

- Text in weekview is slightly smaller
- Search box is only 75% width, and shares similar styling to the search box
- Search items hovers to blue
- Search items are not all bold anymore
- Move to consistent blues across stylesheets
- New "No courses" stylesheet that is actually a link that if clicked focuses on the searchbox.  Also has different text to be more descriptive of what this area is

![screen shot 2014-07-30 at 2 39 00 am](https://cloud.githubusercontent.com/assets/2433509/3745906/516da94e-17b5-11e4-931c-e6946b50b7e7.png)
![screen shot 2014-07-30 at 2 37 50 am](https://cloud.githubusercontent.com/assets/2433509/3745907/516de256-17b5-11e4-865d-7d6c71103741.png)

why are we changing this?