<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="style.css" />
    <link rel="stylesheet" href="https://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.css" />
  </head>
  <body>
    <div id="map"></div>
    <script src="https://cdn.leafletjs.com/leaflet/v0.7.7/leaflet.js"></script>
    <script src="../../lib/proj4-compressed.js"></script>
    <script src="../../src/proj4leaflet.js"></script>
    <script src="script.js"></script>
  </body>
</html>

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="style.css" />
    <link rel="stylesheet" href="../../leaflet/leaflet.css" />
  </head>
  <body>
    <div id="map"></div>
    <script src="../../leaflet/leaflet.js"></script>
    <script src="../../lib/proj4-compressed.js"></script>
    <script src="../../src/proj4leaflet.js"></script>
    <script src="script.js"></script>
  </body>
</html>

Use lib instead of cdn.
Use lib instead of cdn.
