introduction of new output functions to use instead of directly streaming to cout

include/output.hpp

@@ -0,0 +1,14 @@
+#ifndef __OUTPUT_HPP
+#define __OUTPUT_HPP
+
+#include <string>
+
+namespace cellar {
+    namespace output {
+        extern void statement(std::string parm);
+        extern void warning(std::string parm);
+        extern void error(std::string);
+    }
+}
+
+#endif // __OUTPUT_HPP