Added note that if you're creating a plugin to extend another plugin and the original plugin contains services, you need to overwrite the ClpSerializer.java file and update a hard-coded value that's based on the name of the original plugin
Merge branch 'LRDOCS-807-6.1.x' of https://github.com/jrao/liferay-docs into LRDOCS-807-6.1.x
Merge pull request #753 from jhinkey/LRDOCS-807-6.1.x

LRDOCS-807 6.1.x