Minor modifications,  ESLimiter and combine mode 7 removed

I've made this changes in order to make sense the meaning of the lights: examples above
![2014-12-16_00002](https://cloud.githubusercontent.com/assets/3687991/5456912/9d660348-8536-11e4-9e34-1130b360c680.jpg)
beacon light on (in the course)

![2014-12-16_00003](https://cloud.githubusercontent.com/assets/3687991/5456933/b5f513b8-8536-11e4-8e1a-c79f39a3f39e.jpg)
beacon lights and hazard lights on (on the course)

![2014-12-16_00005](https://cloud.githubusercontent.com/assets/3687991/5456981/0697124e-8537-11e4-9d66-a08542fb8400.jpg)
beacon light (always on)