XMLReaderIterator v0.1.4.

- renamed XRN::asSimpleXML() to XRN::getSimpleXMLElement()
- fixed order of operation on XRI::moveNext()
- fixed iterator interface violation in XEI
- fixed XEI::toArray() logic
- fixed order of operation for XEI
- fixed error condition in XRN::asSimpleXML()
- added XRI unit-test
- added XEI unit-test
- updated docblocks
- maintain examples
- maintain XMLReaderIterator
XMLReaderIterator v0.1.5.

- added XMLReaderNextIteration
- added behavior tests
- created exemplary XML files, also in fixtures
- allow files for XMLReaderStub class
- removed superfluous XEI::readString()
Added XMLReaderNavigator
Added uml diagram.
Added local-name support for XMLReaderNode
Iterate over local-names

Changed iteration to local-names for consistency as common behavior with
XMLReader::next().