Log Message:
Update ruby-libxmlto 3.0.0.

== 3.0.0 / 2017-02-07 Charlie Savage

* Revamp how libxml-ruby manages memory.  Instead of trying to return the same \ 
ruby object for each xmlnode,
  the bindings now create wrapper ruby objects as needed which are then freed at \ 
the end of use.
  This allows most memory management to be handled by libxml itself. Ruby only \ 
manages the lifespan of
  documents and parent xml nodes.  When those go out of scope, the underlying \ 
libxml objects are also freed.
  This implementation requires almost no overhead, plays nicely with Nokogiri \ 
and appears to work much
  better  (Charlie Savage).

* Change XML::Node#eql? API.  Nodes are now considered equal only if they wrap \ 
the same underlying
  libxml node.  Previously, they would also be considered equal if they \ 
contained the same content
  (Charlie Savage)

* Change XML::Reader.expand API. Previously it would automatically instantiate a \ 
reader document so
  the an xpath expression could be used to search the returned node.  Now you \ 
should first call
  reader.doc  (Charlie Savage)

* Update Visual Studio project for Visual Studio 15 - requires ruby 2.4+ \ 
(Charlie Savage)

* Remove APIs that have been deprecated for several years (Charlie Savage)