Added README.md

README.md

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+# A malloc-free JSON parser for Arduino
+
+The library is an convenient and efficient wrapper around the *jsmn* tokenizer: http://zserge.com/jsmn.html
+
+It works without any allocation on the heap (no malloc) and supports nested objects.
+
+## Example
+
+    char* json = "{\"Name\":\"Blanchon\",\"Skills\":[\"C\",\"C++\",\"C#\"],\"Age\":32,\"Online\":true}";
+
+    JsonParser<256> parser;
+
+    JsonHashTable hashTable = parser.parseHashTable(json);
+
+    if (!hashTable.success())
+    {
+        return;
+    }
+
+    char* name = hashTable.getString("Name");
+
+    JsonArray skills = hashTable.getArray("Skills");
+
+    int age = hashTable.getLong("Age");
+
+    bool online = hashTable.getBool("Online");
+