diff --git a/node_modules/is-png/index.js b/node_modules/is-png/index.js
new file mode 100644
index 0000000..81e6877
--- /dev/null
+++ b/node_modules/is-png/index.js
@@ -0,0 +1,15 @@
+'use strict';
+module.exports = function (buf) {
+	if (!buf || buf.length < 8) {
+		return false;
+	}
+
+	return buf[0] === 137 &&
+		buf[1] === 80 &&
+		buf[2] === 78 &&
+		buf[3] === 71 &&
+		buf[4] === 13 &&
+		buf[5] === 10 &&
+		buf[6] === 26 &&
+		buf[7] === 10;
+};
diff --git a/node_modules/is-png/license b/node_modules/is-png/license
new file mode 100644
index 0000000..654d0bf
--- /dev/null
+++ b/node_modules/is-png/license
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/node_modules/is-png/package.json b/node_modules/is-png/package.json
new file mode 100644
index 0000000..48f4c05
--- /dev/null
+++ b/node_modules/is-png/package.json
@@ -0,0 +1,76 @@
+{
+  "_from": "is-png@^1.0.0",
+  "_id": "is-png@1.1.0",
+  "_inBundle": false,
+  "_integrity": "sha1-1XSxK/J1wDUEVVcLDltXqwYgd84=",
+  "_location": "/is-png",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "is-png@^1.0.0",
+    "name": "is-png",
+    "escapedName": "is-png",
+    "rawSpec": "^1.0.0",
+    "saveSpec": null,
+    "fetchSpec": "^1.0.0"
+  },
+  "_requiredBy": [
+    "/imagemin-optipng"
+  ],
+  "_resolved": "https://registry.npmjs.org/is-png/-/is-png-1.1.0.tgz",
+  "_shasum": "d574b12bf275c0350455570b0e5b57ab062077ce",
+  "_spec": "is-png@^1.0.0",
+  "_where": "C:\\Users\\marcr\\Desktop\\KorAp\\Git\\Kalamar\\node_modules\\imagemin-optipng",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "sindresorhus@gmail.com",
+    "url": "http://sindresorhus.com"
+  },
+  "bugs": {
+    "url": "https://github.com/sindresorhus/is-png/issues"
+  },
+  "bundleDependencies": false,
+  "deprecated": false,
+  "description": "Check if a Buffer/Uint8Array is a PNG image",
+  "devDependencies": {
+    "mocha": "*",
+    "read-chunk": "^1.0.0"
+  },
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "files": [
+    "index.js"
+  ],
+  "homepage": "https://github.com/sindresorhus/is-png#readme",
+  "keywords": [
+    "png",
+    "portable",
+    "network",
+    "graphics",
+    "image",
+    "img",
+    "pic",
+    "picture",
+    "photo",
+    "type",
+    "detect",
+    "check",
+    "is",
+    "exif",
+    "binary",
+    "buffer",
+    "uint8array"
+  ],
+  "license": "MIT",
+  "name": "is-png",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/sindresorhus/is-png.git"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "version": "1.1.0"
+}
diff --git a/node_modules/is-png/readme.md b/node_modules/is-png/readme.md
new file mode 100644
index 0000000..d95782b
--- /dev/null
+++ b/node_modules/is-png/readme.md
@@ -0,0 +1,55 @@
+# is-png [![Build Status](https://travis-ci.org/sindresorhus/is-png.svg?branch=master)](https://travis-ci.org/sindresorhus/is-png)
+
+> Check if a Buffer/Uint8Array is a [PNG](http://en.wikipedia.org/wiki/Portable_Network_Graphics) image
+
+Used by [image-type](https://github.com/sindresorhus/image-type).
+
+
+## Install
+
+```sh
+$ npm install --save is-png
+```
+
+
+## Usage
+
+##### Node.js
+
+```js
+var readChunk = require('read-chunk'); // npm install read-chunk
+var isPng = require('is-png');
+var buffer = readChunk.sync('unicorn.png', 0, 8);
+
+isPng(buffer);
+//=> true
+```
+
+##### Browser
+
+```js
+var xhr = new XMLHttpRequest();
+xhr.open('GET', 'unicorn.png');
+xhr.responseType = 'arraybuffer';
+
+xhr.onload = function () {
+	isPng(new Uint8Array(this.response));
+	//=> true
+};
+
+xhr.send();
+```
+
+
+## API
+
+### isPng(buffer)
+
+Accepts a Buffer (Node.js) or Uint8Array.
+
+It only needs the first 8 bytes.
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)