Bundle needed gems for BDD

* rspec
* cucumber
* capybara
* database_cleaner

config/database.yml

@@ -9,7 +9,7 @@ development:
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".
 # Do not set this db to the same as development or production.
-test:
+test: &test
   adapter: sqlite3
   database: db/test.sqlite3
   pool: 5
@@ -20,3 +20,6 @@ production:
   database: db/production.sqlite3
   pool: 5
   timeout: 5000
+
+cucumber:
+  <<: *test