Initial commit of 6.1 user guide conversion.
Converting 6.1 user guide to dev site.
Converting sidebar syntax.
Adding images and drawings for user guide articles in discovery dir.
Merge branch 'anchors-6.1.x' of https://github.com/jhinkey/liferay-docs into ug-devsite-6.1.x
Ran ant number-headers on converted user guide articles for dev site.
Merge pull request #1064 from ngaskill/ug-devsite-6.1.x

User Guide breakup for 6.1.x
Merge branch '6.1.x' of github.com:liferay/liferay-docs into 6.1.x