Update README with license info
Update README with link to rosdep
add some sample imu data
Merge pull request #6 from FalkorSystems/master

add some sample imu data from an ar.drone and from a sparkfun razor IMU
add parameter publish_tf

When the imu is used together with other packages, such as
robot_pose_ekf, publishing the transform often interferes with those
packages. This parameter allows to disable tf publishing.
add new test bag: phidgets_imu_upside_down

This is from a phidgets imu, running the phidgets_imu driver mounted on
a wheeled robot that drives a small trip through an office. The IMU is
mounted upside down (i.e., the chips on the board are on the upper side,
lin_acc.z is ~ -9.81). The USB port points to the right side of the
robot. Rotation quaternion from /base_link (x pointing forward, z
pointing up) to /imu is (0, 1, 0, 0).

Contains /imu/data_raw and /imu/mag topics.
Merge pull request #8 from uos/master

added parameter: publish_tf