Update project details and experimental libs

- Unsure on experimental lib at the moment. Need to test pinvoke
overhead. Might move to examples repo.
- Update README.md.
- Update Raylib-cs.csproj.
- Remove GenMeshDefault.

README.md

@@ -2,7 +2,7 @@
 
 # Raylib-cs
 
-C# bindings for raylib 3.5.0, a simple and easy-to-use library to learn videogames programming (www.raylib.com)
+C# bindings for raylib 3.7.0, a simple and easy-to-use library to learn videogames programming (www.raylib.com)
 
 [![GitHub contributors](https://img.shields.io/github/contributors/ChrisDill/Raylib-cs)](https://github.com/ChrisDill/Raylib-cs/graphs/contributors)
 [![License](https://img.shields.io/badge/license-zlib%2Flibpng-blue.svg)](LICENSE)
@@ -19,7 +19,7 @@ Raylib-cs targets netstandard2.1 and supports netcoreapp3.0+ and net5.0.
 This is the prefered method to get started - The package is still new so please report any [issues](https://github.com/ChrisDill/Raylib-cs/issues). 
 
 ```
-dotnet add package Raylib-cs --version 3.5.0
+dotnet add package Raylib-cs --version 3.7.0
 ```
 
 [![NuGet](https://img.shields.io/nuget/dt/raylib-cs)](https://www.nuget.org/packages/Raylib-cs/)
@@ -32,7 +32,7 @@ If you need to edit Raylib-cs source then you will need to add the bindings as a
 
 2. Add Raylib-cs/Raylib-cs.csproj to your project as an existing project.
 
-3. Download the native libraries for the platforms you want to build for using the [official 3.5.0 release](https://github.com/raysan5/raylib/releases/tag/3.5.0).
+3. Download the native libraries for the platforms you want to build for using the [official 3.7.0 release](https://github.com/raysan5/raylib/releases/tag/3.7.0).
    **NOTE: the MSVC version is required for Windows platforms**
 
 4. **(Recommended)** Put the native library for each platform under `Raylib-cs/runtimes/{platform}/native/`