Add brewery_db gem for api access

To use this, make sure you read up on how this works!
Renamed brewery_db initializer
Add brewery_db instructions to README
Add slug to drink and drink_type
Improve url and view for drinks, add brewery db label
Rename `DrinkType` in drinks table to `drink_type`

This must have been a mistake from my side when we created the
drinks scaffold. Rails kept on looking for a snake cased table when
there wasn't any. This change allows us to use rails built-in active
record functions for hiearchical calls.
Rename stock path
Layout for drinks index, fix broken links
Add style to drink form
Improve style on editing drink types
Schema merge
Merge develop into drink-view, resolve some minor issues
Fix margins on home view, add defautl title
Merge pull request #7 from klaseskilson/feature/drink-view

Feature/drink view approved