Baby avatar edit

Installed Carrierwave gem and shows image avatar on Baby's profile page.
Images convert to PNG
Image for thumbnail is resized to 200px
Border radius creates circle avatar

you added it with a migration:
- https://github.com/wdi-hk-sep-2014/iKumo/blob/master/db/migrate/20141203042415_create_babies.rb#L9
then add a new column (db/migrate/20141205075213_add_avatar_to_babies.rb
), and then remove from the view, but the database still has the column