bugfix

corrects &foo=bar1&foo=bar2&foo=bar3&foo=bar4 for
 ==> [ [ [ 'bar1', 'bar2' ], 'bar3' ], 'bar4' ]
by
==> [  'bar1', 'bar2' , 'bar3', 'bar4' ]
Merge pull request #8 from xulien/patch-1

bugfix