add landing page

docs/tasks/bin.js

@@ -0,0 +1,19 @@
+var hasbin = require('hasbin');
+var fs = require('fs');
+var path = require('path');
+
+module.exports = {
+    path: function() {
+        if (fs.existsSync('./vendor/bin/jigsaw')) {
+            return path.normalize('./vendor/bin/jigsaw')
+        }
+
+        if (hasbin.sync('jigsaw')) {
+            return 'jigsaw';
+        }
+
+        console.log('Could not find Jigsaw; please install it via Composer, either locally or globally.');
+
+        process.exit();
+    }
+};