Migration Guide (#2419)

* Migration Guide

Migration guide from JerryScript 1.0 to 2.0.

Co-authored-by: László Langó llango.u-szeged@partner.samsung.com
Co-authored-by: Peter Gal pgal.u-szeged@partner.samsung.com
JerryScript-DCO-1.0-Signed-off-by: Istvan Miklos imiklos2@inf.u-szeged.hu

* Add version information for API methods

For each API method/type the documentation now includes
the version it was introduced or a change occured.

JerryScript-DCO-1.0-Signed-off-by: Peter Gal pgal.u-szeged@partner.samsung.com

Author: Istvan Miklos

README.md

@@ -50,6 +50,7 @@ For additional information see [Getting Started](docs/00.GETTING-STARTED.md).
 - [API Reference](docs/02.API-REFERENCE.md)
 - [API Example](docs/03.API-EXAMPLE.md)
 - [Internals](docs/04.INTERNALS.md)
+- [Migration Guide](docs/16.MIGRATION-GUIDE.md)
 
 ## Contributing
 The project can only accept contributions which are licensed under the [Apache License 2.0](LICENSE) and are signed according to the JerryScript [Developer's Certificate of Origin](DCO.md). For further information please see our [Contribution Guidelines](CONTRIBUTING.md).