Update demos/index.html

According to http://api.jquery.com/category/selectors/attribute-selectors/ the syntax mofle demonstrates has been required for a while.
Attribute values in selector expressions must be surrounded by quotation marks.
http://forum.jquery.com/topic/error-after-upgrade-to-jquery-1-5-in-img-src-new-png
Update demos/target.html
Update demos/thumbnails.html
Merge pull request #46 from neu5/master

Little changes
Renames manifest
Merge branch '2.0' of github.com:stephband/jparallax