Improve speed and accuracy 

Fix issue #63 -> Add support for application-wide license (Android) More info at https://github.com/DoubangoTelecom/ultimateMRZ-SDK/blob/master/PerAppLicense.md

Fix issue #62 -> Add C++ function to the API to retrieve EXIF orienta… …tion value. https://www.doubango.org/SDKs/mrz/docs/cpp-api.html#_CPPv4N14ultimateMrzSdk15UltMrzSdkEngine15exifOrientationEPKvK6size_t

Fix issue #60 to add support for +/-90° rotated images. JSON config e… …ntry to enable:https://www.doubango.org/SDKs/mrz/docs/Configuration_options.html#vertical-check-enabled

- Update the detection models and PCA weights (better accuracy) - Use 2-pass backpropagation (better accuracy) - Autolock the process function to enforce thread safety - Use static linking for libcurl for AWS/Azure activations

Fix issue #47 + Microsoft Azure: Allow attaching the license to the instance instead of H/W. More info at https://github.com/DoubangoTelecom/ultimateMRZ-SDK/blob/master/AWS.md#azure

Fix isssue #48, #45 and #44 - Add support for Image Enhancement for Low Contrast Document (IELCD). More information at https://www.doubango.org/SDKs/mrz/docs/IELCD.html. - Improves the detector's recall score. More info about what "recall" means at https://en.wikipedia.org/wiki/Precision_and_recall#Recall - On x86-64, enable Backpropagation by default. More information about Backpropagation at https://www.doubango.org/SDKs/mrz/docs/Detection_techniques.html#backpropagation

*** Version 2.5.2 *** - Fix issue #42: Add support for backpropagation More information at https://www.doubango.org/SDKs/mrz/docs/Detection_techniques.html#backpropagation