Merge pull request #279 from bit-pirate/hydro-devel

adds another Gazebo related fix
Issue #257: 32 bit alignment error. Fast fix: just remove the
eigen-inheritor attribute, as it's not really needed. It was already
commented in a previous commit; here I just cleanup and provide a
description of the fix.

But the fact is that something is wrong on ecl. We keep track on
https://github.com/stonier/ecl_core/issues/30.
Merge pull request #282 from bit-pirate/hydro-devel

corrects inertia and center of mass using an approximation (fixes #271)
Do not use robot_pose_ekf: https://github.com/yujinrobot/yujin_ocs/issues/7. Instead, use imu for heading and encoders por x and y. However, parameter use_imu_heading makes trivial to switch back to the previous system.
Set use_imu_heading as true (default)
Issue #274: Reset odometry also for heading
https://github.com/turtlebot/turtlebot/issues/91: Changelogs at package level
Fix URL to the previous changelog wiki
lock api for protecting data access with asynchronous getXXX calls.
Merge branch 'hydro-devel' of https://github.com/yujinrobot/kobuki into hydro-devel