Prefactoring for model navigator work

- Added OvationWeb and DataView controllers and layouts
- Removed OvationMain
Added panel view as default model navigator view

- Added default panel showing links for projects, protocols, and sources
Added Model Navigator panels
Adjust styling of panels

- Panels take up 100% of available height
- Panels will be added to the right of existing panels with scrolling
Merge pull request #8 from kvedananda/dev

Added revised model navigator.