Add GameScreenshotUploader; Add Carrierwave initilizer

Author: MarkOates

app/uploaders/game_screenshot_uploader.rb

@@ -0,0 +1,9 @@
+class GameScreenshotUploader < CarrierWave::Uploader::Base
+  def store_dir
+    'screenshots'
+  end
+
+  def extension_whitelist
+    ['jpg', 'jpeg', 'gif', 'png']
+  end
+end

config/initializers/carrierwave.rb

@@ -0,0 +1,10 @@
+CarrierWave.configure do |config|
+  config.storage    = :aws
+  config.aws_bucket = Figaro.env.aws_allegro_planet_bucket
+
+  config.aws_credentials = {
+    access_key_id:     Figaro.env.aws_access_key_id,
+    secret_access_key: Figaro.env.aws_secret_access_key,
+    region:            Figaro.env.aws_region
+  }
+end