fixed bug in dragging to resize facets
Upgraded jquery to version 1.11.1
Merge pull request #106 from karger/2014-07-28_jquery-1.11.1

Upgraded jquery to version 1.11.1
Merge pull request #103 from karger/2014-07-22_facet_resize

fixed bug in dragging to resize facets
Fixed almost all html5 validation errors in demos (still have
missing src attribute on img tags in lenses---unclear how to fix)
fixed css error
Merge branch '2014-07-22_valid_html5' of https://github.com/karger/exhibit into 2014-07-22_valid_html5