Fix "npm run createpkg" (#27)

* Github style image syntax

Author: jschumme

README.md

@@ -13,15 +13,15 @@ A [Visual Studio Code](https://code.visualstudio.com/) extension that provides d
 - Locate the .vsix file you download and click "Open".
 - Click "Restart" to confirm.
 
-<img alt="Installing the extension" src="./docs/images/install-from-vsix.png?raw=true" width="600"><br>
+![Installing the extension](./docs/images/install-from-vsix.png)
 
 **Step 2.** Create a new DataPlugin. Launch VS Code Command Palette (Ctrl+Shift+P), paste the following command, and press enter.
 
 ```json
 NI DataPlugins: Create new Python-DataPlugin
 ```
 
-<img alt="Creating a new DataPlugin" src="./docs/images/create-new-dataplugin.gif?raw=true" width="600"><br>
+![Creating a new DataPlugin](./docs/images/create-new-dataplugin.gif)
 
 **Step 3.** Export the DataPlugin. Right click on the \*.py file you want to export -> Choose "NI DataPlugins: Export DataPlugin". Create a file `.file-extensions` in the root directory of your project and list all file extensions that your DataPlugin should support. If no list is defined, you will be prompted to provide a list of file extensions on first export of your DataPlugin.