Added support for true differential integration of pose variables
Corrected transforms for better handling of differential integration of absolute measurements. Also added container for keeping track of the filter state (on a per-sensor basis) immediately post-update. This facilitates better timing and greater accuracy when using differential integration.
Fixing launch template to match new differential handling
Some corrections for handling twist transforms. Also corrected handling of boolean update vector when a transform is required to go from the sensor to the body frame
Some documentation cleanup
Adding deprecation warning and handling for old differential setting
Merge branch 'differential' of https://github.com/cra-ros-pkg/robot_localization into differential
Merging changes from differential branch