Update coffee/chosen.jquery.coffee

Address jQuery 1.9 removing $.browser
Update coffee/chosen.jquery.coffee
Following stof's advice
Merge pull request #950 from ShaneShipston/master

jQuery 1.9 - $.browser removed
Rebuild the compiled version
Merge pull request #1 from harvesthq/master

Pull master from harvesthq to update to latest version 
browser.name msie for versions ie 6 and 7