- Checking for ApptentiveResources.bundle in Titanium assets directory
http://docs.appcelerator.com/titanium/latest/#!/guide/iOS_Module_Development_Guide-section-29004946_iOSModuleDevelopmentGuide-BundlingModuleAssets
 - Added iOS framework builds to `build_distribution.py`
 - Trigger.io, Titanium, Xamarin
 - This adds the framework as the `ATInfoDistributionKey' in ApptentiveResources.bundle > Info.plist
Modifying build script for Trigger.io and removing unsupported options for now

For Trigger.io, this now postprocesses the binary distribution to match the format required for Trigger.io, so it can be dropped right into that project.

For the others, it's not clear how we'll set the ATInfoDistributionKey value, so punting them for now.

[#54554232]
- New bundle location for Trigger.io modules
Updated Trigger.io resource path to new Module path
Updated Trigger.io resource path to new Module path (cont'd)
Added Titanium distribution back into distribution build script
- Renaming module back to "apptentive" from "apptentive_module"
 - Removed Titanium and Xamarin distributions
 - Setting of Titanium distribution key moved to the Titanium module build script: 842a12935790aead5f0728c660ba721fac924119
Merge branch 'master' into titanium
Merge commit 'bf0f2a60707b39b437585964b8e585dc503abcb2' into titanium