WebSocketClient uses BasicNameValuePair which is removed in Android 6.0 SDK

[vdesmet93]

BasicNameValuePair is part of the Apache HTTP stack, which is removed from the SDK since Android 6.0(M).
Compiling against the final M SDK will break the build since BasicNameValuePair cannot be found.

[mkonecny]

Work-around here:

http://developer.android.com/preview/behavior-changes.html#behavior-apache-http-client