Fix parameter type docs

Fix parameter type docs

Changes:
 - uses int instead of number as param and return value type,
 - uses stdClass instead of stdObject
 - fixes ResourceLoaderClientHtml constructor's $target param type:
   it is string|null, not an array (previously misspelled as "aray")
 - changes the type of references to XML parser in XMP lib to resource
   instead of not existing XMLParser

Change-Id: I98c363ebc6658d1f4dcabad97a9a92f3fcd7ea8c