Enhancement - Integration

- Integrated Cmd object.
- Enhanced Context object with dispatch and shadow methods.
- Fixed bug in Context::parse.
- Implemented command parsing.
- Fixed Sequence bug, and unit tests.

src/task.cpp

@@ -304,7 +304,7 @@ int main (int argc, char** argv)
   try
   {
     context.initialize (argc, argv);
-    if (context.args[0].find ("itask") != std::string::npos)
+    if (context.program.find ("itask") != std::string::npos)
       status = context.interactive ();
     else
       status = context.run ();