Activate REP-0132

This pull request would activate REP-0132:

**Incorporation of Changelogs into Package Source Tree**

This REP describes incorporating package changelogs (i.e. a list of changes made to the package in each release) as part of the package source tree rather than being maintained separately on the ROS wiki. This is to address shortcomings with maintaining a separate changelog list.

Read more: https://github.com/ros-infrastructure/rep/blob/master/rep-0132.rst