Added explicit doc start/end tokens for the emitter, and set it so that if you try to write after you've already written a full doc, it writes a doc start and continues

include/yaml-cpp/emitter.h

@@ -75,6 +75,8 @@ namespace YAML
 		void PostAtomicWrite();
 		void EmitSeparationIfNecessary();
 		
+		void EmitBeginDoc();
+		void EmitEndDoc();
 		void EmitBeginSeq();
 		void EmitEndSeq();
 		void EmitBeginMap();

include/yaml-cpp/emittermanip.h

@@ -41,6 +41,10 @@ namespace YAML
 		Hex,
 		Oct,
 		
+		// document manipulators
+		BeginDoc,
+		EndDoc,
+		
 		// sequence manipulators
 		BeginSeq,
 		EndSeq,