Log Message:
Update to 1.57

Upstream changes:
1.57 2017-01-22 rurban
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  * Todo the t/exec.t test 2 on cygwin.
  * Fixed/Todo the t/decrypt.t test 7 utf8 failures.
    Skip with non UTF-8 locale.

1.56 2017-01-20 rurban
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  * add binmode to the decrypt/encr,decrypt sample scripts
  * add utf8-encoded testcase to t/decrypt.t [cpan #110921]. use -C
  * stabilized some tests, add diag to sometimes failing sh tests
  * moved filter-util.pl to t/
  * fixed INSTALLDIRS back to site since 5.12 [gh #2]
  * fixed exec/sh test races using the same temp. filenames
  * reversed this Changes file to latest first
  * added Travis CI