• 1.0 - 04.15.11
   - Initial Release
• 1.1 - 04.30.11
   - Added velocityReduction property (float value from 0-1). Use this to change how the stroke responds to pen velocity. 0 = no reduction at maximum velocity. 1 = 100% reduction at max velocity or zero-width stroke.
• 1.2 - 05.16.11
   - New Feature: You may now specify a custom security hash value. This may be used to link an autograph with a document ID.  Specify with the setCustomHash:(NSString *)hash method.
   - Bug Fix: autographWithView:delegate: is now autoreleased.  Please make sure you're retaining it, or it will go away unexpectedly.  If you copy/pasted the old demo code, you'll need to update your code.
   - Bug Fix: Autograph Library will no longer crash if the included signature guideline image is not found.
   - The autographDemo project now shows how to display an autograph in high-res on retina display.
• 1.2.1 - 05.17.11
   - Bug Fix: Fixed v1.2 crash on 4.3 device when using a custom security hash.
   - Bug Fix: Autograph Library now correctly reports the custom hash in the lastHash property.
   - Better error handling when the watermark logo is not found.
• 1.3 - 12.22.11
   - New Feature: Location, timestamp, and raw signature data points for each signature now available.
   - New Feature: Signature now returned as T1Signature object. Contains properties listed above, but also an easy to use, retina-ready UIImageView.
   - Bug Fix: Crash fixed for custom hashes less than 10 characters.
   - Bug Fix: Better handling of non-integer view sizes.
   - Deprecation Notice: lastHash property is no longer supported. Use hashString property of T1Signature instead.
   - Deprecation Notice: autographDidCompleteWithImageData:hashValue: is still implemented, but deprecated. Please use new delegate method autograph:didCompleteWithSignature:
• 1.3.1 - 02.06.12
   - Change: It's no longer necessary to multiply the resulting UIImageView frame.size by 2 for some iOS devices. UIImageView will now always display correctly.
   - Bug Fix: armv6 binaries added back into library.
   - Bug Fix: Fixed crashing issue in iOS3.
• 1.3.2 - 08.21.12
   - Change: iOS 6 compatibility

The the latest library and demo project are available here.