patient builder scrolling

## Stories
* https://www.pivotaltracker.com/story/show/62488424
* https://www.pivotaltracker.com/story/show/77141332 (replace scrolling in logic with pagination)

## Notes
* Uses the bootstrap affix plugin to pin the left and right sections to the page when you scroll a certain distance down the page
* Introduces a pagination option for the logic view
* Includes an update of bootstrap
* Includes an update of jquery UI
* Minor adjustment to the dragged element to keep it working and looking proper
* Added some visual feedback - when you start to drag, the droppable area shows as shaded
* Works in IE9, Chrome, Firefox, Safari

### Updates
This is refactored a fair bit from my earlier attempts. Notably, there's more comments, better encapsulation and more appropriate event handling. 

## Screenshot
![image](https://cloud.githubusercontent.com/assets/2136286/5188981/1b4031f2-74a8-11e4-9530-79401b2481bd.png)