Merge pull request #74 from boxen/fix-hook-download

Fix hook downloads

Author: dgoodlad

files/boxen-bottle-hooks.rb

@@ -3,6 +3,7 @@
 require "utils"
 require "net/http"
 require "uri"
+require "base64"
 
 # This monkeypatching sidesteps Homebrew's normal bottle support and uses our,
 # uh, homebrewed S3 binaries. This support is patched in instead of handled in
@@ -15,7 +16,7 @@ def self.file(formula)
   def self.url(formula)
     os     = MacOS.version
     file   = self.file(formula)
-    path = "#{Base64.strict_encode64(HOMEBREW_CELLAR)}/#{os}/#{file}"
+    path = "/#{Base64.strict_encode64(HOMEBREW_CELLAR)}/#{os}/#{file}"
 
     if ENV['BOXEN_HOMEBREW_BOTTLE_URL']
       ENV['BOXEN_HOMEBREW_BOTTLE_URL'] + path