Add curLimitEst to controller_output.msg.
Revert "Add curLimitEst to controller_output.msg."

This reverts commit a32b797d31103ab3299c1de36f14512f699c3aff.

Don't change controller_output.msg for temporary log data.
Add curLimitEst to controller_log_data.
Take absolute value of curTarget.

This might partly explain why the current limit estimation is off.