add calib file
Replaced decimation option with rate option, cleaned up some variable names
Merge branch 'master' of github.com:gareth-cross/imu_3dm_gx4
Updated README
Added notes to readme
Merge branch 'master' of github.com:KumarRobotics/imu_3dm_gx4
Changed erroneous param name in launc file
Added important node on decimation to the readme
Merge pull request #4 from gareth-cross/master

Wrapped Microstrain's decimation options with a 'rate' option.