Add iad referrer to context
Add adTrackingEnabled to context.device

Conflicts:
	Analytics/Integrations/Segmentio/SEGSegmentioIntegration.m
Merge pull request #164 from amplitude/master

Update to Amplitude v2.1.0
Update amplitude version in podspec #164
Fix build phases
1.3.3
Add optimizely dependency
Add optimizely setup
Fix optimizely subspec
Fix file names
Add optimizely to integrations file
Add -track for optimizely
Fix getting revenue from properties to be case-insensitive (fix #167)
Add -registerForRemoteNotificationsWithDeviceToken:options: (fix #170)
1.4.0
Remove apptimize
Merge branch 'add/opptimizely'

* add/opptimizely:
  Add -track for optimizely
  Add optimizely to integrations file
  Fix file names
  Fix optimizely subspec
  Add optimizely setup
  Add optimizely dependency

Conflicts:
	Analytics.podspec
	Analytics.xcodeproj/project.pbxproj
Fix optimizely to be setup synchronously
Fix validation/add start log
Add ecommerce protocol