Add remote signal checking
Unlimit control input, safety switch, yaw control
Change control input range, tunning PID
Change PID parameter
Enable to watch the PID output
Change the order of printf
Clean some dead or useless code
Change the control input design and add mid value of each channel
Dislay MOTOR1~4 vaule(PWM9~12 CCR)
Import some bond function which could ensure the parameter range

I port from paparazzi' project "std.h"
Bond radio control input and MOTOR CCR(PWM9~12)
Fix a error, bond should always do "after" calculatoin
Store the value of Final_M1~M4 before bonding

Because I want to see the "real" value of the parameter.
Even if it is out of the range, we still need to see the
real value of it.
Add O1 to CFLAG
Change Final_M1~M4 type to int16_t
Change PID value(still not enough)
Tuning PID value(stable now)
Change the radio controller range
Change the u16 to int16_t
Merge branch 'master' of github.com:fboris/QuadrotorFlightControl