made a filter function just in case we need to filter

drunk coding for ~1 hour
the cute cl-node now filters it's constant input (so cute! (and useless))
the cl-node is growing up! it now thinks (read: converts from imu to heanding)
made a launchfile for the final product (this might be it!) (needs testing)
added a cl imu mock up node
made the imu mock-up node build
well that took a while, but it works now

you should know that my computer is of by -6 hours (add 6 hours to commit time to get real time e.g. it is not 12:30 in the morning it is 6:30)