Fixed issue with an import that is needed when adding the SDK to an application that is written in Swift.
Fixed issue with an import that is needed when adding the SDK to an application that is written in Swift.

developerdave/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,apigee/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,developerdave/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,apigee/apigee-ios-sdk,apigee/apigee-ios-sdk,developerdave/apigee-ios-sdk,developerdave/apigee-ios-sdk,apigee/apigee-ios-sdk,RobertWalsh/apigee-ios-sdk,apigee/apigee-ios-sdk,apigee/apigee-ios-sdk,developerdave/apigee-ios-sdk,developerdave/apigee-ios-sdk