Point Chartbeat readme link to actual homepage
Add useCanonical to options and _sf_async_config with default value true
Preserve existing _sf_async_config values unless overridden by via settings/defaults
Replace obsolete protocol-specific script load URLs with protocol-agnostic URL
Fix issue where Chartbeat script loads and executes before document.body exists

The Chartbeat script immediately accesses document.body on execution so it must
be sure document.body exists prior to loading.
Quantcast: fix exception in identify()

In some circumstances, if identify() is called after the Quantcast
script is loaded, the queue may be empty and thus the identify call may
throw an exception. This commit adds some more robustness to only add
the `hid` property if the item exists.

Fixes https://github.com/segmentio/analytics.js-integrations/issues/165
mixpanel: delete reserved properties to avoid conflicts
mixpanel: delete ip property too
Merge pull request #192 from segmentio/fix/mixpanel-properties

mixpanel: delete reserved properties to avoid conflicts
Merge branch 'chartbeat-fixes' of https://github.com/dbow/analytics.js-integrations into dbow-chartbeat-fixes
Merge branch 'dbow-chartbeat-fixes'
chartbeat: add tests for window._sf_async_config
Merge pull request #195 from segmentio/update/chartbeat

chartbeat: add tests for window._sf_async_config
Merge branch 'quantcast-uid' of https://github.com/dpolivy/analytics.js-integrations into dpolivy-quantcast-uid
ocd
Merge branch 'dpolivy-quantcast-uid'
Merge branch 'master' of ssh://github.com/segmentio/analytics.js-integrations
kenshoo: refactor