Perlbrew Release 0.68

perlbrew 0.68 is released at 2014-06-07T15:08:00+0200

• disable SSL cert checks. GH #385.
• "perlbrew download stable" works as on expects. GH #383
• Many fish shell fixes. GH #376 #378 #379
• make 5.21 installable. GH #396
• various documentation fixes.