Automatically read table names from Aivo

[tkkarjal]

Currently in aivo_get_info and aivo_set_info the table names are listed in the code. Maintaining the code in synchrony with the evolving structure of Aivo would benefit from automatic reading of the table names.

https://stackoverflow.com/questions/2276644/list-all-tables-in-postgresql-information-schema

[tkkarjal]

This problem was circumvented by creating the view materia.