Improvements for upload script

[PascalLike]

Putting here ideas to improve the upload script:

1) TEMPLATES

The entries in the pygeoapi config file are created starting from this YML template https://github.com/byteroad/ogcapi-simple/blob/master/utils/template_table.yml

Right now, a limited number of variables can be managed this way, mostly DB information like the table name and Bbox properties. It would be useful to manage an external source, even a CSV file, to map other information, like titles, descriptions, keywords etc... To avoid the creation of a new template every time a change emerges (like already done with CRUS https://github.com/byteroad/ogcapi-simple/blob/master/utils/template_crus.yml that changed the title from the table name to something more specific).