Update README (#373)

* Update README

The priorities seemed a bit out of date and, given that we don't really have a super-coherant list of priorities for this package at the minute, I figured it best to remove them for now.

In their place I propose a related work section.

* Tweak

* Update README.md

Co-authored-by: st-- <st--@users.noreply.github.com>

* Update README.md

Co-authored-by: st-- <st--@users.noreply.github.com>

* Update README.md

Co-authored-by: Théo Galy-Fajou <theo.galyfajou@gmail.com>

Co-authored-by: st-- <st--@users.noreply.github.com>
Co-authored-by: Théo Galy-Fajou <theo.galyfajou@gmail.com>

Author: 3 people

README.md

@@ -12,9 +12,11 @@
 
 ## Kernel functions for machine learning
 
-KernelFunctions.jl provide a flexible and complete framework for kernel functions, pretransforming the input data.
+KernelFunctions.jl provides a flexible framework for defining kernel functions, and an extensive collection of implementations.
 
-The aim is to make the API as model-agnostic as possible while still being user-friendly.
+The aim is to make the API as model-agnostic as possible while still being user-friendly, and to interoperate well with generic packages for handling parameters like [ParameterHandling.jl](https://github.com/invenia/ParameterHandling.jl/) and FluxML's [Functors.jl](https://github.com/FluxML/Functors.jl/).
+
+Where appropriate, kernels are AD-compatible.
 
 ## Examples
 
@@ -46,12 +48,12 @@ plot(
   <img src="docs/src/assets/heatmap_combination.png" width=400px>
 </p>
 
-## Packages goals (by priority)
-- Ensure AD Compatibility (already the case for Zygote, ForwardDiff)
-- Toeplitz Matrices compatibility
+## Related Work
 
 Directly inspired by the [MLKernels](https://github.com/trthatcher/MLKernels.jl) package.
 
+See the JuliaGaussianProcesses [Github organisation](https://github.com/JuliaGaussianProcesses) and [website](https://juliagaussianprocesses.github.io/) for more related packages.
+
 ## Issues/Contributing
 
 If you notice a problem or would like to contribute by adding more kernel functions or features please [submit an issue](https://github.com/JuliaGaussianProcesses/KernelFunctions.jl/issues), or open a PR (please see the [ColPrac](https://github.com/SciML/ColPrac) contribution guidelines).