Log Message:
Update to 1.55
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1.55 2015-07-26 rurban
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  * Fix t/z_pod-coverage.t with old Test::More by Kent Frederik. RT #106090.
  * Fix t/tee.t + t/order.t race under parallel testing. RT #105396.
    Thanks to Kent Frederik
  * Fix Filter exec refcount, breaking earlier parse exits with __DATA__ RT #101668
    Thanks to user42_kevin@yahoo.com.au
  * Add missing filter_del in exec filter.
  * Add pod for Filter::Util::Call::unimport to fix t/z_pod-coverage.t