londiste: imported drop_obsolete_partitions(2) function
londiste: reformatted drop_obsolete_partitions() to lower case
londiste.drop_obsolete_partitions: added support for different partitioning periods
londiste.drop_obsolete_partitions: amended
londiste.drop_obsolete_partitions: changed to raise notice instead of returning rows; defaults to public schema.
noise
londiste: added dispatch handler arg retention_period

It controls how long to keep partitions around. Examples: '3 months', '1 year'