Updated All Outlines list display and sort order

I'll be a student in the upcoming 1410 class and have been reviewing the class outline archives. The current list was kind of hard to navigate (unordered, non-outlines included, link naming) so I thought I'd take a shot at updating. 

- Created a new helpers module (OutlineListHelpers) with methods for 1) pulling a sorted list of only site resources with an 'outline' layout, and 2) parsing the name from the file path
- Passed this revised outline list and updated naming convention to <li> loop in all.html.haml (original capped records at 101, update caps at 100)

Updated <li> display:
![screen shot 2014-10-14 at 11 12 59 pm](https://cloud.githubusercontent.com/assets/3827810/4640458/9ead94fa-5421-11e4-8a22-f33bc94cc1e7.png)