LRDOCS-504 Updated section on the Blogs page, Blogs portlet, Recent Blogs portlet, and Related Assets; explained that Related Assets portlet is no longer provided on the Blogs page by default but can easily be added; explained how the Blogs and Recent Blogs portlets work together and that their display styles can be configured
Reorganized SO headings to make the TOC more useful on liferay.com/documentation, added information to the Installing Social Office section, created a Validating your Social Office installation section
Added information to Validating a Social Office Installation section
Added section on pre-installation portal properties configuration, further reorganized the Social Office guide
Fixed markdown images, put the description and URL both on the same line
Merge pull request #477 from jrao/soffice-guide-reorg

Soffice guide reorganization and additional content
Renumbered images.