New unit_test framework:

* Header-only!
* No external dependencies or other beast modules
* Compilation options allow for:
  - Stand-alone application to run a single test suite
  - Stand-alone application to run a set of test suites
  - Global suite of tests inline with the host application
  - Disable test suite generation completely
* Existing tests reworked to use the new classes

beast/utility/Utility.cpp

@@ -26,10 +26,11 @@
 // For Journal and Debug
 #include "../../modules/beast_core/beast_core.h"
 
-#include "impl/Assert.cpp"
 #include "impl/Debug.cpp"
 #include "impl/Journal.cpp"
 #include "impl/LeakChecked.cpp"
 #include "impl/StaticObject.cpp"
 #include "impl/PropertyStream.cpp"
+
+#include "tests/bassert.test.cpp"
 #include "tests/empty_base_optimization.test.cpp"