feat(draw-route): scaffold the draw route UI

**Note**: *This is a work in progress. Do not merge yet.*

## Description

> When the user is creating their model the following diagram is the screen they will see. The top orange bar is for functionality features (copy/paste, new diagram, zoom in/out, etc.). The red side bar will be collapsible and is shown expanded. There will be a tabbed interface to switch between any sub menus (eg. stencils). Properties are for selected elements in the diagram. Stencils are for prefab elements that you can drag into the diagram. The green bar is a tabbed interface to switch between multiple diagrams created. The “Diagram Area” will be the main drag and drop interface where users can create their models. The bottom blue bar is shown collapsed and will expand to show: STRIDE Analysis, Messages/Warnings about the diagram, User entered notes, and generated reports.

## Mockup

![mockup](https://docs.google.com/drawings/d/1JvTdGa9vYUYm2GQoPoKXHE0We4OZOx2yv9OzVXuHw9g/pub?w=960&h=720)

## Screenshot

![image](https://cloud.githubusercontent.com/assets/1885333/4313945/e7020cfc-3ed4-11e4-980a-1020162bf718.png)