Set Max Zoom level when circuit changed
Adding .sass-cache to .gitignore
Improvements to BaseCircuitPage.

- Better initialisation logic
- Consolidate map/circuit link logic
Styling points list for bounds finder page
Changing bounds calibration URL
Upgrade libs

Underscore 1.4.3 -> 1.4.4
Backbone 0.9.2 -> 0.9.10
jQuery 1.8.3 -> 1.9.1
Add nginx config and directory to .gitignore
Fixing broken script reference
Fix BaseCircuitPage