Update README.md

Author: niemyjski

README.md

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 [![Build status](https://ci.appveyor.com/api/projects/status/ahu7u4tvls56wqqu?svg=true)](https://ci.appveyor.com/project/Exceptionless/exceptionless-javascript) [![Gitter](https://badges.gitter.im/Join Chat.svg)](https://gitter.im/exceptionless/Discuss)
 
 Exceptionless JavaScript client
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+**We are very very early in development on this project. Use at your own RISK!! All feedback / pull requests are welcome.**