update readme

README.md

@@ -8,11 +8,19 @@ Try it out [here](https://garrepi.dev/swal)
 
 really just to explore SwiftWasm in a meaningful way. hopefully, someone finds directly interacting with the algorithms in [this swift library](https://github.com/apple/swift-algorithms) useful
 
+### contributing
+
+feel free to contribute! I have a habit of starting projects and never finishing... 
+
+the hosted version of this has to be updated manually by me (running it through my [static site](https://github.com/johngarrett/johngarrett.github.io))
+
+also, `FileManager` and `String.write(to:,_:,_:)` seem to be broken in the wasm fork of swift. because of that, html is directly injected into the DOM. `StaticRenderer` is _suopssed_ to render all the HyperSwift into a html and css file but, without the ability to write, that's not being done.
+
 ### status
 
 - [X] Combinations  
 - [X] Permutations  
-- [ ] Rotations  
+- [X] Rotations  
 - [ ] Partitions  
 - [ ] Chain  
 - [ ] Product