add YandexMobileMetrica SDK change log

README.md

@@ -1,10 +1,32 @@
-Yandex.Metrica for Apps.
+## Yandex.Metrica for Apps SDK
 
-EULA could be found at:
-http://legal.yandex.com/metrica_termsofuse/
+## License
+License agreement on use of Yandex.Metrica for Apps SDK is available at [EULA site] [LICENSE] 
 
-Documentation could be found at:
-http://api.yandex.com/metrica-mobile-sdk/
+## Documentation
+Documentation could be found at [metrica official site] [DOCUMENTATION]
+
+## Sample project
+Sample project to use is available at [GitHub] [GitHubSAMPLE]
+
+## SDK Version 1.2, Changelog
+* Reduced size of library by half added to target app
+* Optimised performance up to 30%
+* Added arm64 and x86_64 slice to the library's binary
+* Added arm64 crash handling
+* Moved to protobuf-c
+* Extracted FMDB as an external dependency
+* Adjusted session length logic
+* Added API for managing library logging
+* Added jailbreak detection 
+* Improved library stability
+
+## SDK Version 1.0.1, Changelog
+* Removed private methods
+* Extracted ProtobufObjC as an external dependency
+
+
+[LICENSE]: http://legal.yandex.ru/metrica_termsofuse/ "Yandex.Metrica agreement"
+[DOCUMENTATION]: http://api.yandex.com/metrica-mobile-sdk/ "Yandex.Metrica for Apps documentation"
+[GitHubSAMPLE]:https://github.com/yandexmobile/metrica-sample-ios/
 
-Sample project to use:
-https://github.com/yandexmobile/metrica-sample-ios/