Bugfix for handling an array of identically-named elements

[tbauscher]

This is a fix for handling an array of identically-named elements, like so:

{ :attribute_names => { "string" => ["some", "array"] } }

Without the fix, the array is converted to a string.

[rubiii]

could you add specs for this?

[rubiii]

thanks drew for writing a spec for this, but unfortunately the problem involves namespaces and had to be tested in a different way. so i used the taxcloud wsdl and finally fixed the issue: rubiii/savon@0e346977

thanks again. i'm going to release this along with a couple other bugfixes asap.