TNetXNGFile: When no mode string is passed assume we're opening in read mode
From Sergey Linev: Patch in TXMLEngine to support both single and double quotes
Fix for ROOT-6589 (CMake with -Dtesting=1: Compression.h not in include/)
Use the latest version of Davix. This solves a compilation error on 32bit
Improved precision from %f to %.12g in TGDMLRead/Write
Added TGeoElementTable::AddElement(TGeoElement *elem) interface to add user elements to the element table. Added TGeoElement::Print(option) to allow printing the element table. Several options available