Extracted seed class out of seed file and put class and methods into a Seed model

Created Json file that holds a sample response from our api
Wrote a spec for the seed model that tests the parse beer data method's output
Extracted beer genre info out of seed file and put into json file

Will make it easier to follow what is happening in the seed and edit genres at a later time if needed
Spec written to check the seed genres method.

When passing a json formatted string similar to that in our beer_genre.json file,
we expect a BeerGenre object to be created
Refactored seed#flavors method by extracting flavors array into json file
Refactored Seed#genres method

Altered json file, considering we only expect it to hold beer genres.
It has been formatted to resemble an array with Json beer genres
Wrote test for Seed#flavors method

Tests to see that given a properly formatted string, FoodFlavor objects are created
uncommented Seed.beers
Merge pull request #113 from fence-lizards-2014/seed_specs

Seed specs