Updated embedded Clara to 0.0.2.3

- has all new, more robust, token parsing.
- eliminates issue with unreachable code
- allows use of forward slashes to introduce short args on Windows

projects/SelfTest/TestMain.cpp

@@ -26,7 +26,7 @@ namespace {
 template<size_t size>
 void parseIntoConfig( const char * (&argv)[size], Catch::ConfigData& config ) {
     Catch::Clara::CommandLine<Catch::ConfigData> parser = Catch::makeCommandLineParser();
-    parser.parseInto( size, argv, config );
+    parser.parseInto( Catch::Clara::argsToVector( size, argv ), config );
 }
 
 template<size_t size>