documenting checkbox / radio button "highlight" class - fixes issue #364
Merge pull request #374 from ExactTarget/checkbox_radio_highlight_docs

Document Checkbox / Radio Button "Highlight" Class
Updated index.html and index-imhtheme.html with updated datagrid documentation.
Merge pull request #375 from andyengle/gh-pages-2.6.0-wip-andyengle

Updated index.html and index-imhtheme.html with updated datagrid documen...
adding documentation that was never written
Merge branch 'gh-pages-2.6.0-wip' of github.com:ExactTarget/fuelux into gh-pages-2.6.0-wip
updating imhtheme docs
final 2.6.0 doc updates