Research best approach for normalization of .csproj XML content

[jbatte47]

DoD: best (easiest / most time-effective) approach has been identified for developing an XML re-writer that uses normalized element / attribute sorting to minimize differences between multiple save states.

Note that //Include/Compile elements differ only by their descendant and attribute content; don't rule out the possibility that a file-type-specific solution will be required (no standard XML normalizer would use attribute or element content as a sorting key)