Map from compound names to compound IDs

[joewandy]

Many data, including to covid one, use the names of the compounds as the ID. It's very tedious trying to map each compound name to KEGG/ChEBI ID manually. We need an automatic way to do this.

1. To begin with, I think we can just do a script or notebook to map from names -> ID.

2. Later on we should add this functionality to the data upload page. For example, MetaboAnalyst displays a page showing its attempt in mapping names and IDs. User can delete an entry from this page if it isn't correct.

[RonanDaly]

This would be very useful!