XML parser issues

[daniloercoli]

I got some weird xml parser issues. are we using a strict xml validating parser?
(XML parser should not be set as strict).

One more thing, when the response XML-RPC is broken and the parser throws an error, we should "clean" the XMLRPC response passing it through tidy before resending it to the parser.

Common cases:

• the xml document preamble is not on the first document line. this happen when plugins (or themes) add characters at the begining of the xmlrpc response.

(it is a server error, but it should caught on the mobile side)

• malformed xml document (like above: ex: BOM on the first line)
• missing end tag