Updated API Reference (markdown)

API-Reference.md

@@ -1,9 +1,27 @@
 :construction: Work in progress, feel free to edit :construction:
 
 ## JsonArray
-Create an empty JsonArray attached to the specified JsonBuffer.
-You should not call this constructor directly.
-Instead, use JsonBuffer::createArray() or JsonBuffer::parseArray().
+
+Represents an array in a JSON object tree.
+
+### Constructor
+
+The constructor is private, you cannot instanciate a `JsonArray` directly, you have to use a `JsonBuffer`.
+
+Because the actual memory location of a `JsonArray` is in the `JsonBuffer`, you always manipulate them through reference and you cannot copy them.
+
+##### Example
+
+```c++
+StaticJsonBuffer<200> jsonBuffer;
+
+// create an empty array
+JsonArray& array1 = jsonBuffer.createArray();
+
+// parse a JSON array
+char json[] = "[1,2,3]";
+JsonArray& array2 = jsonBuffer.parseArray(json);
+```
 
 ### JsonArray::add()