Add analysis_server_client without analysis_server

pkg/analysis_server_client/README.md

Index: pkg/analysis_server_client/README.md
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+# Analysis Server Client
+
+A client wrapper over Analysis Server. Instances of this client manages
+connection to Analysis Server and process and faciliates JSON protocol
+communication to and from the server. 
+
+Current implementation has no knowledge of the Analysis Server library yet.
+Future updates will allow for full class-access of Analysis Server protocol
+objects. 
+
+Analysis Server process must be instantiated separately and loaded into
+Analysis Server Client. To learn how to generate an Analysis Server Process,
+refer to the [Analysis Server page.](https://github.com/dart-lang/sdk/tree/master/pkg/analysis_server)