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Added BSD licensing info per Yahoo!
Open Source Working Group's instructions.
Minor update to responsive grids.
Fixed RST link.
3.5.0 is out; fleshed out usage instructions.
Added comments about relative paths.
Added note about relative base path.
Removed unused test/experimental file.
Changed all getContent/setContent references to getHTML/setHTML.
Changed formatting slightly.
Initial commit of YUI 3 Cookbook example files.