update README to point to the heroku app
dm-migrations required for auto_upgrade!
add dm-migrations for heroku deploy
dm postgres adapter for heroku
newer version of datamapper
default_options is obsolete
heroku gem manifest
adjustments for heroku
update README and license info
Updated DatMapper models and views, edited README.
Add updated ruby file, views and new README.
comment out unnecessary validations (show for tutorial reasons)
redirect to new snippet form if requested form not found