making the faultactor a string instead of a URI

Even though the [SOAP Spec](http://www.w3.org/TR/2000/NOTE-SOAP-20000508/#_Toc478383507) says the faultactor must be a URI, some services send down a string instead. Since, I don't think I can get the service supplier to change it, the only solution I could come up with is to change scalaxb to make the faultactor a String instead of blowing up with an URI IllegalArgumentException. I was a little conflicted about this, but :pensive: 

The [Java](http://docs.oracle.com/javaee/5/api/javax/xml/soap/SOAPFault.html) and [.NET](http://msdn.microsoft.com/en-us/library/system.runtime.serialization.formatters.soapfault.aspx) SOAP system clases make it a string as well.