Updated Memory model (markdown)

Memory model.md

@@ -47,6 +47,22 @@ This fixed allocation approach may seem a bit strange, especially if your a desk
 
 Don't forget that the memory is "freed" as soon as the `StaticJsonBuffer` is out of scope, like any other variable. It only hold the memory for a short amount of time.
 
+## Dynamic memory allocation
+
+This library also supports dynamic memory allocation.
+
+However, usage of this memory model is **strongly discouraged** in embedded environments.
+
+To switch to dynamic memory allocation, simply replace:
+
+    StaticJsonBuffer<N> jsonBuffer;
+
+by
+
+    DynamicJsonBuffer jsonBuffer;
+
+Memory is released in `DynamicJsonBuffer`'s destructor, so you don't have to do anything special.
+
 ## Memory usage
 
 #### Object size for 8-bit AVR