change project name
first introduction of timer interrupt for servo control
using scanning angles, setting max distance
 - Drive action runs continuously, even through a range scan (this is good)
 - turn if new turning angle set, clear turning angle after
 - normal and high-speed ping rates
 - start a scan immediately after backing up
 - seperate methods for straight-ahead range and not-straight-ahead range
use trigonometric function to favour angles closest to straight ahead
add libraries
Merge branch 'master' of github.com:barton-satchwill/robot