• Fix crashing issue on Android 2.3.* devices #159.
• Fix PayPalService.clearAllUserData() to clear all environments when PayPalService is not running #155. If PayPalService is running, the v4 support library is still required to clear the current user data.
• Fix issue with PayPalService.clearAllUserData() not actually clearing the current user #156.
• Add some helpful logging to PayPalService.clearAllUserData().
• Minor bug fixes.