dont reset ids and traits
Merge pull request #354 from segmentio/fix/persisting

dont reset ids and traits
upgrade analytics.js-integrations to 0.4.1
Release 1.3.3
update integrations to 0.4.2
Release 1.3.4
upgrade integrations to 0.4.3
Release 1.3.5
upgrade integrations to 0.4.4
Release 1.3.6
upgrade integrations to 0.4.5
Release 1.3.7
upgrade integrations to 0.4.6
Release 1.3.8
upgrade integrations to 0.4.7
Release 1.3.9
upgrade to analytics.js-integrations 0.4.8
Release 1.3.10
updating analytics.js-integrations to 0.4.9
Release 1.3.11