Merge pull request #63 from coverall/fix/s3-endpoint

Fix S3 endpoint

Author: dgoodlad

files/boxen-bottle-hooks.rb

@@ -18,7 +18,7 @@ def self.url(formula)
     host   = ENV['BOXEN_S3_HOST'] || 's3.amazonaws.com'
     bucket = ENV['BOXEN_S3_BUCKET'] || 'boxen-downloads'
 
-    "http://#{host}/#{bucket}/homebrew/#{os}/#{file}"
+    "http://#{bucket}.#{host}/homebrew/#{os}/#{file}"
   end
 
   def self.bottled?(formula)