Add explicit link in preparation of it begin required

Casks/app-zapper.rb

@@ -3,4 +3,5 @@ class AppZapper < Cask
   homepage 'http://www.appzapper.com/'
   version 'latest'
   no_checksum
+  link :app, 'AppZapper.app'
 end

Casks/cyberduck.rb

@@ -3,4 +3,5 @@ class Cyberduck < Cask
   homepage 'http://cyberduck.ch'
   version '4.2.1'
   sha1 '6f1e220830f324ba136b4301b12711f6037176c7'
+  link :app, 'Cyberduck.app'
 end

Casks/daisy-disk.rb

@@ -3,4 +3,5 @@ class DaisyDisk < Cask
   homepage 'http://www.daisydiskapp.com'
   version '2.1.2'
   sha1 '584eb479c41e2e73142fd69ce77bc57470d718de'
+  link :app, 'DaisyDisk.app'
 end

Casks/filebot.rb

@@ -3,4 +3,5 @@ class Filebot < Cask
   homepage 'http://www.filebot.net/'
   version '3.6'
   sha1 'ad492132226c0f6eb019a5dc62e59449cd5d98cd'
+  link :app, 'FileBot.app'
 end

Casks/menu-meters.rb

@@ -3,4 +3,10 @@ class MenuMeters < Cask
   homepage 'http://www.ragingmenace.com/software/menumeters/'
   version 'latest'
   no_checksum
+  link :app, 'MenuMeters Installer.app'
+
+  def caveats; <<-EOS.undent
+    You need to run MenuMeters Installer.app to actually install MenuMeters
+    EOS
+  end
 end

Casks/name-changer.rb

@@ -3,4 +3,5 @@ class NameChanger < Cask
   homepage 'http://www.mrrsoftware.com/MRRSoftware/NameChanger.html'
   version '2.3.3'
   sha1 'b9af8add259a0055a3748aeddfd56984a82cb6f2'
+  link :app, 'NameChanger.app'
 end

Casks/please-sleep.rb

@@ -3,4 +3,5 @@ class PleaseSleep < Cask
   homepage 'http://www.dragonone.com/products/macosx/pleasesleep/'
   version 'latest'
   no_checksum
+  link :app, 'PleaseSleep.app'
 end

Casks/the-unarchiver.rb

@@ -3,4 +3,5 @@ class TheUnarchiver < Cask
   homepage 'http://unarchiver.c3.cx/'
   version '3.7'
   sha1 'da29b9f591d299cf1f869b7c77aac38908748ad5'
+  link :app, 'The Unarchiver.app'
 end

Casks/you-need-a-budget.rb

@@ -3,4 +3,5 @@ class YouNeedABudget < Cask
   homepage 'http://www.youneedabudget.com/'
   version '4.1.553'
   sha1 'bf10b82ecf741d4655ab864717e307eb1858e385'
+  link :app, 'YNAB 4.app'
 end