Additional tools for working with IBE, including SIA access

PR includes tools for listing the valid / available data sets, missions, tables and a tool for querying the SIA component of IBE (which is the only programmatic way to get image access, as far as I can tell)
They weren't always identical, especially for `data`.  I prefer to keep the flexibility unless it's harmful.  In some cases, I think the URL was something like `thing?param=value` with a description that was useful