Update for version 1.4.3
Made missing `ApptentiveResources.bundle` alert a bit more helpful.
Fixes IOS-495
Survey "Send Response" button now uses app's tint color (or ATConnect tint color, if set).
Fixes IOS-514
Removed `ATSurveyNewSurveyAvailableNotification` (not available in the Engagement framework)
Equivalent will be re-added in IOS-512
Adding event name to FeedbackDemo button.
Using correct `testRatingFlow` event.
Added `ATInteractionType` enum.
IOS-516
Check if an interaction is valid, not just if its criteria are met.
If interaction is unknown to client, the interaction should not be valid (even if its criteria are met).
IOS-516
Moved existing Upgrade Message version check to `isValid`.
IOS-516
Added `showSuccessMessage` property to Surveys.
Fixes issue where success message was always shown if `success_message` was present in survey from server, regardless of `show_success_message`.
Fixes IOS-515
Setting Survey properties directly.
Bumped Engagement Surveys release to 1.5.0.
Merge branch 'master' into Next

Conflicts:
	ApptentiveConnect/source/ATConnect.h
	docs/APIChanges.md
Updated changelog for 1.5.0
Merge branch 'readme' into Next
Updated API changelog for 1.5.0
Update podspec to 1.5.0
Markdown Typo.
Remove link to Features doc to stay on topic with integration.
Readme improvements.