2.6.0: allow two-factor authentication; bug fixes.

• Allow login by users who have enabled two-factor authentication on their PayPal accounts.
• Streamline Profile Sharing for cases where a user has previously authorized sharing.
• Prevent a "duplicate symbol" problem for apps that are also integrating with 1Password.
• Minor bug fixes.

2.5.0: fix iOS 6 crash; add optional delegate methods, popover support

• NOTE: version 2.5.0 requires Xcode 6 and iOS 8 SDK. If you are still using Xcode 5, please use version 2.3.2 of this SDK.
• Add presentingInPopover property to PayPalConfiguration.
• Add a new optional delegate method for each of our view controllers, to allow your app
  to talk with your server while our activity indicator is still visible.
• Fix an iOS 6 crash. issue #202
• Update card.io library to 3.10.0.

2.4.2: fix HUF and TWD currencies

• NOTE: version 2.4.2 requires Xcode 6 and iOS 8 SDK. If you are still using Xcode 5, please use version 2.3.2 of this SDK.
• Correct the number of expected decimal places for the HUF and TWD currencies. issue #191
• Update card.io library to 3.9.0.

2.4.1: fix a Shipping Address bug

• NOTE: version 2.4.1 requires Xcode 6 and iOS 8 SDK. If you are still using Xcode 5, please use version 2.3.2 of this SDK.
• Fix a bug where user selection of Shipping Address (for a Single Payment) sometimes did not work correctly.

2.4.0: iOS 8, Xcode 6, 1Password

• NOTE 1: version 2.4.0 requires Xcode 6 and iOS 8 SDK. If you are still using Xcode 5, please use version 2.3.2 of this SDK.
• NOTE 2: in the Link Binary With Libraries section of your project target's Build Phases, add:
  • AudioToolbox.framework
  • CoreMedia.framework
  • MobileCoreServices.framework
• Official release for iOS 8, built with Xcode 6 GM seed.
• Support use of the iOS 8 1Password Extension for PayPal logins.
• Update Sample App icons.
• Update card.io library to 3.8.6.
• Improve mSDK behavior when presented within a popover.
• Update some localized strings.
• Minor bug fixes.

2.3.2 Fix Version String

• Fix version string

2.3.1: Update localized strings.

• Update some localized strings.

2.3.0: Add orders, custom fields.

• Add support for order payments.
• Add invoiceNumber, custom, and softDescriptor as optional properties on PayPalPayment.
• For Single Payments, an individual PayPalItem price may now be negative (for coupons, etc). issue #162
• Support use of the iOS 8 1Password Extension for PayPal logins.

2.2.1: Minor bug fixes.

• Minor bug fixes.

2.2.0: Add Profile Sharing, Shipping Address, Funding Options

• Add Profile Sharing feature. (See PayPalProfileSharingViewController.h.)
• For PayPal single payments, allow user to choose from app-provided and/or PayPal-account-provided Shipping Address.
• For PayPal single payments, user will now automatically be offered a choice of funding options (when appropriate).
• Fix a bug in the clearAllUserData method of PayPalMobile. (Credit card not being cleared while app remains in memory.)