Print data instead of puts

Zipping a directory with the old example would change the content of a file by adding a newline to the data getting zipped.
This is bad if you want to validate files of zip with checksums or, in my case, corrupt git index files if you zip a git-directory.

README.md

@@ -100,7 +100,7 @@ class ZipFileGenerator
         subdir =Dir.entries(diskFilePath); subdir.delete("."); subdir.delete("..")
         writeEntries(subdir, zipFilePath, io)
       else
-        io.get_output_stream(zipFilePath) { |f| f.puts(File.open(diskFilePath, "rb").read())}
+        io.get_output_stream(zipFilePath) { |f| f.print(File.open(diskFilePath, "rb").read())}
       end
     }
   end