Merge pull request #3 from gareth-cross/master

Update to version 0.0.2
update launch file, change arg value to default
added udev script
rename addUdevRuleScript to script
add output option to imu.launch
Merge branch 'master' of https://github.com/KumarRobotics/imu_3dm_gx4
Merge branch 'master' of github.com:KumarRobotics/imu_3dm_gx4