Log Message:
p5-Method-Signatures: update to 20170211.

20170211    Feb 11 13:38:39 PST 2017
    Promoted to full release

20160608.0051_002   Wed Jun  8 00:51:42 PDT 2016
    New Features
    * Can now put prototypes in front of signatures
      (provides compatibility with sigs in 5.20)
      [RT/93336, github #99/#127] (thanks brummett)

20160516.2032_001   Mon May 16 20:32:59 PDT 2016
    New Features
    * Can now use bare sigils as placeholders
      (provides compatibility with sigs in 5.20)
      [RT/93334, github #100/#126] (thanks brummett)