LRDOCS-1285 Created a tutorial that covers the aui:validator tag.
Merge branch 'LRDOCS-1285' of https://github.com/mwilliams2014/liferay-docs into LRDOCS-1285-QA
QA edits.
Merge branch 'LRDOCS-1285-QA' of https://github.com/ngaskill/liferay-docs into LRDOCS-1285-R