add pointer controlling over udp
math::quaternion: remove early test leftovers
ahrs: tilt: guard against acos(>1), acos(<-1)
ahrs: implement complementary filter
ahrs: tilt: fix direction
gy-801-dump: bump gyro read rate
gy-801-dump: perform quaternion forward integration
gy-801-dump: continuous measuring
sensors::L3G4200D: read byte by byte
the chip i have seems to response to smbus read word in wrong order
gy-801-dump: read L3G4200D
i2c::smbus: implement completely in hare
the c library is actually pretty simple to port
this remove the need to link with c library
uinput-pointer: simplify use of uinput submodule
tools: add uinput-pointer