Release 3.1.0

[3.1.0] - 2017-01-23

Added

• The "distribution" parameter to the aptly::publish define
• A uid and gid to use when running the aptly command-line to avoid to run those
  as root and redefine the rights on the aerospike directory every time

Changed

• Default architectures from an empty array to an array containing only amd64 to
  avoid ending up with a default ./public/pool directory

Dropped

• The version-dependent files have been dropped (aka Gemfile.lock)