Hanging bridge complete.

/**
* Follow line with 40% of his speed.
* Simple line follow without sharper turns.
* If wall nearer than 1m for 2 seconds - switch speed to 15% and go in
complex mode.
* Wall being far than 1m or touch sensors triggered (opponent hit)
resets the timer.
*/
Tape Follow Speed Variable, faster tape follow

better obstacle values
tests
tape follow values experiments, better follow?
Merge branch 'master' of https://github.com/mg2/LegoMindstorms