Fixing some logging.
Merge branch 'Next' of github.com:apptentive/apptentive-ios into Next
Replacing a couple of NSLog calls
Added integration with Amazon Web Services (AWS)
Fixes IOS-461
Added integration with Amazon Web Services' Simple Notification Service.
Fixes IOS-461
Added `utc_offset` to device info.
Fixes IOS-466.
URL encoding each token of the codepoint.
Fixes IOS-479
URL encoding each token of the codepoint.
(Use the ATUtilities function instead).
Fixes IOS-479
Changelog for 1.4.1
Added individual docstrings for the 3rd-party integration methods.
Initial cut at IOS-470 Add support for new operator "$not"
Initial cut of IOS-465 Add support for new operator "$contains"
Initial cut of IOS-471 Add support for new operator "$exists"
Fixes #91 ATAppConfigurationUpdateTask needs to retain self before updating task state
Fixes #90 ATLogger fails to catch exception if no space left on device
Merge branch 'master' into Next

Conflicts:
	ApptentiveConnect/source/Engagement/Persistence/ATEngagementBackend.m
	CHANGELOG.md
Fixes IOS-464 Device should have "Current Time" available for query from interaction criteria
IOS-480 New "app_release" criteria field for version, build, etc.

Only adding version and builds, since target_sdk_version and app_store seem to be Android-specific.
Fixing memory leak of NSCompoundPredicate introduced in changes for IOS-470.
IOS-469 Test that custom data of wrong type simply fails criteria evaluation.