Failing test for XPath namespace query in VMAP document

Also added a comparable test in ONOXMLTests that doesn't use namespaces
in the query, to demonstrate that XPath without namespaces works fine.

(And in fact, moving the `xmlns:uo="uo"` namespace declaration attribute
to the end of the attributes in the root element of vmap.xml will make
the test pass.)
Minor reformatting

Adding XML declaration in vmap example xml
[Issue #20] Fixing issue where namespace attribute order changed results of namespaced XPath query
Bumping version to 1.1.2
Adding lineNumber property to ONOXMLElement
Adding test about blank element