This was previously effectively being done by XmlDocument in the multiple passes through the XML.
This change tells XmlReader to ignore whitespace. This also means changing arguments to use XmlReader instead of XmlTextReader (a descendent of XmlReader) directly.
XmlReader.Create() has been the recommend way to create XML readers since .NET 2.0 as per MS SDK and is the only way to specific ignore whitespace settings.
Logging level was DEBUG before 312e145 (Fri Feb 3 2012).
312e145 also accidentally removed the 'general error' log message if any shape deserialization failed.
This commit restores it, though this has no functional impact.