Added tests and methods for CommandIQ integration with segment.io - track -> trackEvent and identify -> identifyUser

Needs additional work for certain data types (non-integer numbers),
tests, and docs
If a trackEvent value is a number, but not an integer, it will instead be sent as a string.
Added urbanairship_ios_device_token to list of post params for identifyUser- it was copied and pasted incorrectly
Updated api URL to non-test (prod)  version.
Added a delimiter for event name and it's properties when calling trackEvent.
wip
add intercom track

using .timestamp() for the created field

adding logImpression, updating segmentio-integration dep

Release 0.1.26

mailchimp: fix for messages which have no email field

Release 0.1.27
customer.io: add group()

helpers: add group()

helpers: add page()
ga: add page()
intercom: add group()

helpers: add more properties to group
commandiq: cleanup
Merge branch 'commandiq'
Merge remote-tracking branch 'origin/add/methods'
Merge branch 'master' of github.com:segmentio/integrations
Release 0.1.28