Docs page for vignettes or scenarios

[pjbull]

Would be cool to have snippets page that covers some very common tasks. Here are a few off the top of my head:

• [ ] recursively get all files in a directory (i.e., with glob)
• [ ] list directory, but not recursively
• [ ] write a new file to the cloud
• [ ] make a persistent local cache
• [ ] open a file for read/write
• [ ] passing an instantiated client rather than using the default