Log Message:
Update to 2.000015
------------------
2.000015 - 2014-12-12
 - Avoid using += in Makefile when bootstrapping for portability (RT#100797)
 - adjust quoting of paths with spaces to work with ExtUtils::MakeMaker 7.0,
   and bump our EUMM prereq to 7.0.
 - fix shell test for shells where we can't prevent some rc files from being
   loaded, like zsh (RT#99819).