Update synthetic spread property setting to support three states, and add a scroll setting.
Updated dependencies
Set bundle ID to “org.readium.SDKLauncher.iOS”

And set the release build configuration to sign
the app with the Readium foundations enterprise
iOS certificate for distribution to testers.
Merge pull request #20 from datalogics-bhaugen/code-signing-enterprise

Set bundle ID to “org.readium.SDKLauncher.iOS”
Update submodule.
Update submodule.
Merge remote-tracking branch 'origin/develop' into develop
Update readium-sdk module.