Add the disclaimer

Author: Amogh Shetkar

README.md

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+This repository is provided for legacy users and informational purposes only. It may contain security vulnerabilities in the code itself or its dependencies. TIBCO provides no updates, including security updates, to this code. Consistent with the terms of the Apache License 2.0 that apply to the TIBCO code in this repository, the code is provided on an "as is" basis, without any warranties or conditions of any kind and in no event and under no legal theory shall TIBCO be liable to you for damages arising as a result of the use or inability to use the code.
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 ## SnappyData's extensions to Spark
 
 - SnappyData collocates Spark executors with its in-memory data store in the same JVM. To achieve this, support for external cluster manager in Spark 2.0 is used to add a SnappyData cluster manager.