Update postgresql_adapter.rb

Need to surround db name with quotes for Postgresql
remove 3 from rails support

it's actually 3+
console task for playing around locally
run migrations from all registered migrations paths
make tld_length configurable in Apartment
Explain many-to-many excluded models
migration tasks now enhance originals

This means they no longer depend on db migration tasks

Instead they can optionally 'enhance' these tasks to run tenant migrations after
first step towards removing the word database
more removal of the word 'database'
todo updates
release 0.24.0
conflicts
release 0.24.1