Update Encode to CPAN version 2.70

Update Encode to CPAN version 2.70

  [DELTA]

$Revision: 2.70 $ $Date: 2015/02/05 10:53:00 $
! Makefile.PL
  add bin/encguess to EXE_FILES

2.69 2015/02/05 10:35:11
! bin/encguess
  Refactored so that
  * does not depend on non-core module (File::Slurp in particular)
  * PODified document
  * -s "encA encB" to -s encA,encB which is more shell-friendly
  * and more
! MANIFEST
+ bin/encguess
  Pulled: Added CLI wrapper for Encode::Guess
  https://github.com/dankogai/p5-encode/pull/32
! Unicode/Unicode.pm
  Pulled: Bump $VERSION in module changed since Encode-2.60
  https://github.com/dankogai/p5-encode/pull/31