Share 'Grasshopper 0.8.0050 developer pre-release'

Dear GHA developers,   hopefully very soon I'll release Grasshopper 0.8.0050 to the public. I'm pre-releasing 0.8.0050 on the VB/C# forum first so developers can take a look at it. This release contains many breaking changes to the SDK and has utterly lost file-format forwards compatibility. The binary gh file format is now saved with standard Deflate compression and it has become the default for…