Improvements to community projects page

*Fix links to SqlCommandProvider and ComposableQuery
*Change the FAKE link to point to the new documentation
*Fix broken formatting on FSharp.Data sublist
*Add project logos so the page is a little less dull

The images are included here instead of linked to their original source because markdown images doesn't support resize, and using an <img> tag breaks Jekyll (http://stackoverflow.com/questions/20305185/inline-html-in-jekyll-github-pages)

You can preview how it looks here: http://fsfoundation.codebeside.org/community/projects/