* Added ability to query catalogs using the catalogsearch module. This includes: - querying vizier for a region for sources using query_region - querying vizier for a catlog for rows corresponding to ids using query_id - querying simbad for alternative names for a given name using query_names - matching alternative names for sources to catalog stings using match_names_catalogs
* Added documentation for catalogsearch in docs/tutorials/catalog-searches.ipynb
* Broke previous tutorial doucmentation into multiple files: - mission-search focussed data-searches.ipynb - cloud-searches and configuration options in cloud-data-searches.ipynb
* Made versions of astropy and python more permissive