PlatformIO-based manifest file

Web: http://platformio.ikravets.com/#!/lib/show/Arduino-MFRC522
Docs: http://docs.platformio.ikravets.com/en/latest/librarymanager/index.html

library.json

@@ -0,0 +1,10 @@
+{
+  "name": "Arduino-MFRC522",
+  "keywords": "rfid, spi",
+  "description": "Read a card using a MFRC522 reader on your SPI interface on your Arduino",
+  "repository":
+  {
+    "type": "git",
+    "url": "https://github.com/miguelbalboa/rfid.git"
+  }
+}