Fix incompatibility with JQuery UI v1.10. Closes #1668, Closes #1670.

Thanks to @vala and @xhj.
Replaced global selectors in $ function in rails_admin.dom_ready event handlers to narrower optional find() calls
Merge pull request #1671 from scarfaceDeb/scoped-dom_ready

Replaced global selectors in $ function in rails_admin.dom_ready event h...
Allow JRuby failures
fix name clash causing failures on nested-one/nested-many
Merge remote-tracking branch 'original/master'