Database is populate using csv file

Description:All beers are loaded on dabatase using a csv file included
on assets folder. The csv must be updated to the final version.

Commit:Add

TaskNumber:#1
Beers from database are loaded using Loaders

Description:On BeerListFragment calls loader to get all beers on
database to show on screen. When user clicks on one item, this item id
is passed to BeerDetailFragment. On BeerDetailFragment calls loader
to get the selected beer, using its id to query.

Commit:Add

TaskNumber: resolves #1