Fix location of source files; add "platforms" field

library.json

@@ -3,17 +3,15 @@
   "keywords": "PID, controller, signal",
   "description": "A PID controller seeks to keep some input variable close to a desired setpoint by adjusting an output. The way in which it does this can be 'tuned' by adjusting three parameters (P,I,D).",
   "url": "http://playground.arduino.cc/Code/PIDLibrary",
-  "include": "PID_v1",
   "authors":
-  [
-    {
-      "name": "Brett Beauregard"
-    }
-  ],
+  {
+    "name": "Brett Beauregard"
+  },
   "repository":
   {
     "type": "git",
     "url": "https://github.com/br3ttb/Arduino-PID-Library.git"
   },
-  "frameworks": "arduino"
+  "frameworks": "arduino",
+  "platforms": "atmelavr"
 }