critic: _valid_API_key --> _valid_api_key

This placates a brutal perl critic and prevents:
   Subroutine "_valid_API_key" is not all lower case or all upper case at line
   119, column 1.  See pages 45,46 of PBP.  (Severity: 1)
critic: unpack @_

This placates perlcritic and prevents the following warnings:
    Always unpack @_ first at line 71, column 1.  See page 178 of PBP.  (Severity: 4)
    Always unpack @_ first at line 113, column 1.  See page 178 of PBP.  (Severity: 4)
critic: qr// --> qr//xms

Appease the critic gods and prevent the following warnings:
    Regular expression without "/x" flag at line 86, column 18.  See page 236 of PBP.  (Severity: 3)
    Regular expression without "/x" flag at line 90, column 18.  See page 236 of PBP.  (Severity: 3)
    Regular expression without "/x" flag at line 94, column 18.  See page 236 of PBP.  (Severity: 3)
    Regular expression without "/x" flag at line 99, column 18.  See page 236 of PBP.  (Severity: 3)
    Regular expression without "/x" flag at line 128, column 23.  See page 236 of PBP.  (Severity: 3)
critic: add 'return' to subs

This placates perlcritic and prevents these warnings:
    Subroutine "verify" does not end with "return" at line 71, column 1.  See page 197 of PBP.  (Severity: 4)
    Subroutine "notify" does not end with "return" at line 112, column 1.  See page 197 of PBP.  (Severity: 4)
Merge branch 'perlcritic' into dzil
dzil: PreReqs --> Prereqs
Update Changes (critic, prereqs)
Commit README.mkdn for v0.0.5_04
Drop Test::Kwalitee plugin from dist.ini

Life's to short to battle 'you didn't use strict' all over again