meshlab patch

Notes

Depending on user's OS, build environment etc it may be necessary to change line endings of patches/meshlab.patch file from CRLF to LF in order for patch operation to succeed

Overview

"Parser" based on QtXml, need to change to use pugixml

pugixml notes

Note that it isn't possible to add an unattached pugixml Node object, modify it, then add it to the tree later; the node needs to be attached somewhere in the tree on instantiation (even if it's a temporary at root level to be removed when finished) before populating, adding children etc.