adjust/unity_sdk v4.0.3

Receipt validation

on GitHub

• Adding .py extension to scripts for better handling on different operating systems
• Adding macMd5TrackingEnabled property to AdjustConfig for iOS
• Adding processNameproperty to AdjustConfig for Android
• Exposing Android native setReferrer method
• Exposing iOS native setDeviceToken method
• Exposing setReceipt and setTransactionId methods to AdjustEvent for iOS receipt validation

Native versions:
iOS@v4.2.8
Android@v4.1.1

Pull Request #48