add resource links

Author: gojimmypi

README.md

@@ -29,6 +29,11 @@ Open the project and press `F5` to launch an experimental versional of Visual St
 
 ## Modifications
 
+## Tips
+
+Ensure the `CopyLocal` is set to `false` for all project references.
+
+
 TODO
 
 ## Case Sensitivity
@@ -38,9 +43,12 @@ There seems to be a disagreement between various sources as to whether G-Code is
 or lower case without changing the meaning of a line."
 
 ## Resources
+* [Microsoft - Visual Studio Extensibility: Creating Visual Studio VSIX package extension](https://social.technet.microsoft.com/wiki/contents/articles/37071.visual-studio-extensibility-creating-visual-studio-vsix-package-extension.aspx)
 * [Microsoft - Walkthrough: Publish a Visual Studio extension](https://docs.microsoft.com/en-us/visualstudio/extensibility/walkthrough-publishing-a-visual-studio-extension?view=vs-2019)
 * [Microsoft - Walkthrough: Displaying Statement Completion](https://docs.microsoft.com/en-us/visualstudio/extensibility/walkthrough-displaying-statement-completion)
 
+* [Extensibility tools written by Mads Kristensen](https://marketplace.visualstudio.com/items?itemName=MadsKristensen.ExtensibilityTools)
+* [GitHub - Extensibility Tools for Visual Studio](https://github.com/madskristensen/ExtensibilityTools)
 * [C# Color Table](http://flounder.com/csharp_color_table.htm)
 * [The NIST RS274NGC Interpreter - Version 3](https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=823374)
 * [wikipedia - G-Codes](https://en.wikipedia.org/wiki/G-code)