Merge tag 'V0.1.1' into develop

0.1.1

* tag 'V0.1.1':
fix CPU count on OS X
remove dupe pry dependency
protect ThreadGroup - necessary on JRuby to avoid CME in @group.list
version 0.1.2
Merge branch 'release/0.1.2'

* release/0.1.2:
  version 0.1.2
  protect ThreadGroup - necessary on JRuby to avoid CME in @group.list
  remove dupe pry dependency
  fix CPU count on OS X