[feature] import a CSV table

This is a tiny tool aiming to build a MySQL table out of a CSV file. All you have to do is:

• to provide a CSV file,
• to select a name for the target table,
• to select delimiters.

Initially, the requirement was to inject some Excel sheet in a YACS server to develop various SQL queries on data. This has become tables/import.php, and it is accessible from the index of tables, at tables/index.php.