sp_add_trusted_assembly

Hey great lib, glad I found you before trying to do the same! 👍 

I think this release steps are missing
```
declare @a varbinary(max) = 0x4D5A...

declare @hash varbinary(64) = HASHBYTES('SHA2_512',@a)

EXEC sys.sp_add_trusted_assembly @hash = @Hash, @description = N'ClrHttpRequest'
```