Bump to 3.4.0

Gemfile.lock

 PATH
 PATH
   remote: .
   remote: .
   specs:
   specs:
-    paperclip (3.3.1)
+    paperclip (3.4.0)
       activemodel (>= 3.0.0)
       activemodel (>= 3.0.0)
       activerecord (>= 3.0.0)
       activerecord (>= 3.0.0)
       activesupport (>= 3.0.0)
       activesupport (>= 3.0.0)
@@ -167,7 +167,7 @@ GEM
     treetop (1.4.10)
     treetop (1.4.10)
       polyglot
       polyglot
       polyglot (>= 0.3.1)
       polyglot (>= 0.3.1)
-    tzinfo (0.3.33)
+    tzinfo (0.3.35)
     uuidtools (2.1.2)
     uuidtools (2.1.2)
     xpath (0.1.4)
     xpath (0.1.4)
       nokogiri (~> 1.3)
       nokogiri (~> 1.3)

lib/paperclip/version.rb

 module Paperclip
 module Paperclip
-  VERSION = "3.3.1" unless defined? Paperclip::VERSION
+  VERSION = "3.4.0" unless defined? Paperclip::VERSION
 end
 end