use more forgiving 'unstructured' query format in Bing Locations API
Remove note about Yahoo not being free.
Workaround for Rubinius version error on Travis.

See: http://docs.travis-ci.com/user/languages/ruby/
Merge pull request #659 from lukewendling/master

use more forgiving 'unstructured' query format in Bing Locations API

See docs: http://msdn.microsoft.com/en-us/library/ff701711.aspx