Allow to use jquery-rails 2.1

Conflicts:
	core/refinerycms-core.gemspec
relax jquery-rails version requirements
bump version of devise
bump version of jquery.corner
include jquery.browser plugin
replace deprecated jquery 'live' with 'on'
fix for jquery.corner
devise now using not_found_in_database
fix nested page expansion
use jquery .data instead of .attr
Merge pull request #2211 from rounders/spree-compatible

Spree compatible