Added export script and dependencies

export.js

@@ -0,0 +1,69 @@
+var fs = require('fs')
+var gs = require('ghostscript')
+var path = require('path')
+
+var reckon_path = "."
+var export_path = "export"
+var index_name = "index.json"
+
+if(!fs.existsSync(export_path))
+	fs.mkdirSync(export_path);
+
+var index = [];
+var index_path = path.join(export_path, index_name);
+if(fs.existsSync(index_path))
+	index = JSON.parse(fs.readFileSync(index_path, 'utf8'));
+
+
+fs.readdir(reckon_path, function(err, files) {
+	if(err)
+		throw err;
+	files.map(function (f) {
+		return {"name" : f, "path" : path.join(reckon_path, f)};
+	}).filter(function (f) {
+			return (fs.statSync(f.path).isFile() && path.extname(f.path) === '.pdf' && !exists(f.name));		
+	}).forEach(function (f) {
+		var img_fname = extract_img(f.path);
+		var entry = {}		
+		entry.name = f.name;
+		entry.imgs = [];
+		entry.imgs.push(img_fname);
+		index.push(entry);
+	})
+
+	var index_content = JSON.stringify(index, null, 2);
+	fs.writeFile(index_path, index_content, function(err) {
+		if(err) return console.log(err);
+		console.log(index_path + '>' + index_content);
+	}); 
+	
+});
+
+
+
+function extract_img(file) {
+
+	var out_name = path.basename(file) + ".png"
+	var out = path.join(export_path, out_name);
+	
+	gs()
+  .batch()
+  .quiet()
+  .nopause()
+  .device('pngalpha')
+  .input(file)
+  .output(out)
+  .r(72)
+  .spawn();
+
+  return out_name;
+
+}
+
+function exists(fname) {
+	for (var e in index) {
+		if(index[e].name === fname)
+			return true;
+	}
+	return false;
+}

package.json

@@ -21,6 +21,11 @@
   },
   "homepage": "https://github.com/gauthiier/reckon",
   "dependencies": {
+    "ghostscript": "https://github.com/gauthiier/node-ghostscript/tarball/master",
     "nodegit": "^0.4.0"
+  },
+  "scripts" : {
+    "export": "node export.js",
+    "index": "node index.js > index.html"
   }
 }