Perlbrew Release 0.67

perlbrew 0.67 is released at 2013-11-20T08:40:52+0100 with contributions from many people. Thanks to All!

Support fish shell. Thanks to @yenzie++
info command now takes an optional module name and show information for it. Thanks to @trcjr++
doc/bug fixes from @mmcclimon++, @mperry2++, and markstos++