complete Readme.md, add tests, add function overloads to src

README.md

@@ -52,7 +52,7 @@ If you use ProxTV.jl in your work, please cite using the reference given in [CIT
 
 ## Contributing
 
-If you want to make contributions of any kind, please first that a look into our [contributing guide directly on GitHub](docs/src/90-contributing.md) or the [contributing page on the website](https://nathanemac.github.io/ProxTV.jl/dev/90-contributing/).
+If you want to make contributions of any kind, please first that a look into our [contributing guide directly on GitHub](docs/src/90-contributing.md).
 
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