Added info to the delta configuration files in the configuration.h file

Marlin/Configuration.h

 // Advanced settings can be found in Configuration_adv.h
 // BASIC SETTINGS: select your board type, temperature sensor type, axis scaling, and endstop configuration
 
+//===========================================================================
+//============================= DELTA Printer ===============================
+//===========================================================================
+// For a Delta printer rplace the configuration files wilth the files in the 
+// example_configurations/delta directory.
+// 
+
 // User-specified version info of this build to display in [Pronterface, etc] terminal window during
 // startup. Implementation of an idea by Prof Braino to inform user that any changes made to this
 // build by the user have been successfully uploaded into firmware.