4-ch rc value routines
fix for kRCMaxNChannel
add kPhi
add rc raw msg
merge encoder to sensor
change to use Serial2
test w.r.t. the merging of encoder to sensor
merge encoder to sensor (continued)
sending um6, rc, and encoder data
receiving um6, rc, and encoder data
initial test-bench setting
actuatue:esc lib
servo lib
Merge pull request #55 from tttor/actuator-atmega2560

Actuator atmega2560 plus an initial test on test-bench settings