Perlbrew Release 0.74

0.74 is released at 2015-11-24T20:55:02+0100 with many changes and many contrtibutes during the past 9 months. Thank everyone who participated.

A big thanks for our contributers: Aristotle Pagaltzis, Dave Jacoby, Dylan Cali, John Krull, Kevin Johnson, Nathan Day, Paul Cochrane, Tudor Constantin, Yanick Champoux, tm604
support PERLBREW_LIB_PREFIX. https://github.com/gugod/App-perlbrew/commit/c29813cd4633683bd049964178a9ac96647986bc
prefer https and remove insecure download cli flags. https://github.com/gugod/App-perlbrew/commit/f49a908c1702942006de4654107edf77a48ead52
perlbrew now dies when switching to/use a lib that does not exist. https://github.com/gugod/App-perlbrew/issues/432
RHEL vendorlib fix https://github.com/gugod/App-perlbrew/issues/409
improvements with fish integration.
unbreak when running with perl 5.14 or earlier: "list" command now correctly display lib names.
retaining flags in upgrade-perl. https://github.com/gugod/App-perlbrew/commit/b8d466670bbfc8e214a9d3ff2e889a4860060d84
variour document clean up and improvements.