Updated makefile to run tests after building and added :clean and :all tasks.

Added UnityHelper module in order to show how to extend Unity.

git-svn-id: http://unity.svn.sourceforge.net/svnroot/unity/trunk@2 e7d17a6e-8845-0410-bbbc-c8efb4fdad7e

src/unity.h

@@ -34,6 +34,7 @@ void CreateResults();
 
 void UnityBegin();
 void UnityEnd(void);
+int  UnityGetNumFailures(void);
 
 void UnityPrintChar(char ch);
 void UnityPrint(const char *string);