Added TomTom HDTraffic (realtime traffic) layer and reduced icon sizes

- Small title fix
- Reduced TomTom icon dimensions in line with other icons
- Added TomTom realtime traffic layer (see attached).

![screenshot at 2013-07-30 14 12 16](https://f.cloud.github.com/assets/827370/878414/5ed49b10-f911-11e2-9c8e-69461f30719e.png)