Add link to documentation site

Author: aedart

README.md

@@ -2,6 +2,10 @@
 
 A collection of [CMake](https://cmake.org/) scripts for C++ projects.
 
+# Official Documentation
+
+Please read the [official documentation](https://rsps.github.io/cmake-scripts) for additional information.
+
 ## Versioning
 
 This package follows [Semantic Versioning 2.0.0](http://semver.org/)