Remove change of file mode on files

This appears to be here to allow recursive copying in the case of nested
directories.

This causes some issues though:

* It adds exec bits to every file, not just to directories
* A call to mode.to_i.even? that takes into account the entire mode
rather than just the number it is talking about.
    * In the case of an 0700 mode it be bumped up to 0800 and be invalid

libraries/s3_dir.rb

@@ -10,9 +10,6 @@ def self.dir_mode(mode)
         mode = mode.to_s(8)
       end
 
-      (-3..-1).each do |i|
-        mode[i] = (mode[i].to_i + 1).to_s if !mode[i].to_i.zero? && mode.to_i.even?
-      end
       mode
     end