Merge branch 'LRDOCS-1060-QA' of https://github.com/mwilliams2014/liferay-docs into LRDOCS-1061
Moving content from LRDOCS-1061 into LRDOCS-1060.
Adding segue to end of tutorial.
Merge branch 'LRDOCS-1061' of https://github.com/ngaskill/liferay-docs into pr-175-LRDOCS-1060-1061

Conflicts:
	develop/tutorials/articles/platform-frameworks/performing-a-custom-action-using-a-hook.markdown
LRDOCS-1060 Merge in changes from Nick Gaskill's (see https://github.com/jhinkey/liferay-docs/pull/180)
LRDOCS-1060 Re-arrange sidebars and add Next Steps
LRDOCS-1061 Add Next Steps and remove unneeded header IDs
LRDOCS-1061 Remove old hook Markdown file from platform-frameworks section.
Use relative URLs
Merge pull request #953 from jhinkey/pr-175-LRDOCS-1060-1061

2 Hook tutorials