Added self-test for section ordering

Added MockReporter for tracking test runs.
Added intrusive smart pointer. Config holds reporter by smart pointer, so we can route the mock reporter through multiple test runs

projects/SelfTest/TestMain.cpp

@@ -43,7 +43,7 @@ TEST_CASE( "selftest/main", "Runs all Catch self tests and checks their results"
                     "Number of 'succeeding' tests is fixed" )
         {
             runner.runMatching( "./succeeding/*" );
-            CHECK( runner.getTotals().assertions.passed == 276 );
+            CHECK( runner.getTotals().assertions.passed == 273 );
             CHECK( runner.getTotals().assertions.failed == 0 );
         }