Some ActiveRecord like behaviour

- allow creating an accessor to a field that does something to the original value 
```
def field1
  "#{self[:field1]} special!"
end
```

- return truthy value on a successful save, in this case, the saved record
``` 
# very common in rails' controllers
if my_record.save 
  p "Success!"
else
  p "Sadness."
end
```

Tests included.