make the xmltest to return != 0, if one of the tests has failed.
added test rule.
Merge pull request #120 from PKEuS/master

Added support for building TinyXML into a .dll or .lib
Merge pull request #123 from diasbruno/xmltest-return

xmltest: if one of the tests has failed, return > 0.
Merge pull request #124 from diasbruno/makefile-test

added test rule.
clean up the pass/fail logic, still return the same value from test if it fails
Merge pull request #125 from PKEuS/master

Added depth as constructor argument to XMLPrinter