make setup_data_mapper a class method
extract setting up database
only calls finalize if it's responding
remove dm-migrations dependency and use our own type_map
s/reset/auto_migrate/
TODO.md: remove things i no longer care and add modern todo items
Rakefile: automatically pull submodule upon running rake
Merge branch 'master' into remove-dm-migrations

* master:
  Hacking in Float and Date support for Postgres.
add auto_migrate to create tables
more datatype for sqlite3
fix misspelling
we need to finalize on autogen_class too
i am so stupid :(