Update vendor/assets/javascripts/jquery.nested-fields.js

Make it compatible with jQuery 1.9
Update lib/awesome_nested_fields/version.rb

Bump version after fix
Update vendor/assets/javascripts/jquery.nested-fields.min.js

Minified version
Update vendor/assets/javascripts/jquery.nested-fields.js

Changed the String#trim() to jQuery#trim
Update vendor/assets/javascripts/jquery.nested-fields.min.js

Changed String#trim to jQuery#trim
Merge pull request #25 from thiagodiniz/master

Fixing for jQuery 1.9