LRDOCS-988 Added Carousel Article to devGuide
LRDOCS-988 Added Images for the AUI-Carousel to the devGuide
LRDOCS-988 Added folder for sample images to the devGuide
LRDOCS-986 Copied  Eduardo Garcia's RTL Hook documentation from https://github.com/jhinkey/liferay-plugins/pull/6
LRDOCS-986 edited epgarcia's RTL Hook section to match guidelines
LRDOCS-986 added epgarcia's RTL Hook images to devGuide images folder
Merge branch 'rtl-hook' of https://github.com/mwilliams2014/liferay-docs into rtl-hook-mike

Conflicts:
	devGuide/en/chapters/11-customizing-with-hooks.markdown
Resolve conflict 2
Adding user guide section on Twitter app. Updating #of users listed for Facebook.
LRDOCS-988 Minor editing for the beginning part of the content
LRDOCS-988 Format Markdown to fix ordered list numbering.
Merge branch 'master' into carousel
LRDOCS-988 Wordsmith
LRDOCS-988 Using an AlloyUI Carousel in Your Portlet
LRDOCS-988 Formatted my lines to 80 columns.
LRDOCS-988 Added header IDs.
LRDOCS-986 Added steps for using rtl-hook in portlets and fixed build.xml steps.
Merge branch 'rtl-hook' of https://github.com/mwilliams2014/liferay-docs into rtl-hook
LRDOCS-986 Formatted code blocks. The backtick notation doesn't work well in list items.
LRDOCS-986 Wordsmith intro and title.