LRDOCS-749: Recommend extending BaseImpl instead of implementing interface
LRDOCS-749: Wordsmith
Merge branch 'extend-baseimpl' of https://github.com/codyhoag/liferay-docs into extend-baseimpl
LRDOCS-749: Move to Hooks chapter and give examples for extending services using base Impls
Merge branch 'master' into extend-baseimpl
Merge branch 'extend-baseimpl' of https://github.com/codyhoag/liferay-docs into extend-baseimpl
LRDOCS-749 Wordsmith
Merge pull request #779 from jhinkey/extend-baseimpl

LRDOCS-749 Emphasize implementing base implementations instead of interfaces