Created Quick Start (markdown)

Quick-Start.md

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+    #include <ArduinoJson.h>
+
+#### Decoding / Parsing
+   
+    char json[] = "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
+
+    StaticJsonBuffer<200> jsonBuffer;
+
+    JsonObject& root = jsonBuffer.parseObject(json);
+
+    const char* sensor = root["sensor"];
+    long time          = root["time"];
+    double latitude    = root["data"][0];
+    double longitude   = root["data"][1];
+
+[See complete guide](/doc/Decoding JSON.md)
+
+#### Encoding / Generating
+   
+    StaticJsonBuffer<200> jsonBuffer;
+
+    JsonObject& root = jsonBuffer.createObject();
+    root["sensor"] = "gps";
+    root["time"] = 1351824120;
+
+    JsonArray& data = root.createNestedArray("data");
+    data.add(48.756080, 6);  // 6 is the number of decimals to print
+    data.add(2.302038, 6);   // if not specified, 2 digits are printed
+
+    root.printTo(Serial);
+    // This prints:
+    // {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}
+
+[See complete guide](/doc/Encoding JSON.md)