Updating changelog prior to indigo release of version 2.2.0
Updating changelog prior to indigo release of version 2.2.0

tscho1l/robot_localization,ayrton04/robot_localization,adnanademovic/robot_localization,punithm/robot_localization,braincorp/robot_localization,braincorp/robot_localization,punithm/robot_localization,ayrton04/robot_localization,adnanademovic/robot_localization,tscho1l/robot_localization