Do global testsuite initialization properly.
Do global testsuite initialization properly.

Instead of calling unit_test_main manually from main, do it the proper
Boost.Test way: define BOOST_TEST_MAIN and have a global fixture for
srcdir initialization.

vslavik/xmlwrapp,vadz/xmlwrapp,thriqon/xmlwrapp,vslavik/xmlwrapp,vadz/xmlwrapp,vadz/xmlwrapp,thriqon/xmlwrapp,thriqon/xmlwrapp,vslavik/xmlwrapp