fix: move header in subdir

README.md

@@ -19,7 +19,7 @@ Example
 #include <iostream>
 #include <iomanip>
 
-#include "exceptions.h" 
+#include <exceptions/exceptions.h>
 
 // Use this macro to build up your hierarchy of exceptions
 EXCEPTION( Exception, Existential_Observation );

example.cpp

@@ -5,7 +5,7 @@
 #include <sstream>
 #include <stdexcept>
 
-#include "exceptions.h" 
+#include "exceptions/exceptions.h" 
 
 // Use this macro to build up your hierarchy of exceptions
 EXCEPTION( Exception, Existential_Observation );