feat(flight-finder): implement milestone M1 - domain model and skill contract

skills/flight-finder/node_modules/png-js/README.md

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+png.js
+======
+A PNG decoder in JS for the canvas element or Node.js.
+
+## Browser Usage
+Simply include png.js and zlib.js on your HTML page, create a canvas element, and call PNG.load to load an image.
+
+    <canvas></canvas>
+    <script src="zlib.js"></script>
+    <script src="png.js"></script>
+    <script>
+        var canvas = document.getElementsByTagName('canvas')[0];
+        PNG.load('some.png', canvas);
+    </script>
+    
+The source code for the browser version resides in `png.js` and also supports loading and displaying animated PNGs.
+    
+## Node.js Usage
+Install the module using npm
+
+    sudo npm install png-js
+    
+Require the module and decode a PNG
+
+    var PNG = require('png-js');
+    PNG.decode('some.png', function(pixels) {
+        // pixels is a 1d array (in rgba order) of decoded pixel data
+    });
+    
+You can also call `PNG.load` if you want to load the PNG (but not decode the pixels) synchronously.  If you already
+have the PNG data in a buffer, simply use `new PNG(buffer)`.  In both of these cases, you need to call `png.decode`
+yourself which passes your callback the decoded pixels as a buffer.  If you already have a buffer you want the pixels
+copied to, call `copyToImageData` with your buffer and the decoded pixels as returned from `decodePixels`.