readme: explain plugin, source, credit

README.md

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+# Space Engineers: Timeout Fix
+
+A plugin for the [Space Engineers][space-engineers] game to fix the "server
+is not responding" error, [reported][bug-report] but never fixed.
+
+[space-engineers]: https://www.spaceengineersgame.com/
+[bug-report]: https://support.keenswh.com/spaceengineers/pc/topic/server-not-responding-many-unable-to-join-servers
+
+The plugin was originally written by Space Engineers community member _rexxar_
+and released on [reddit][reddit] with the source.
+
+[reddit]: https://www.reddit.com/r/spaceengineers/comments/f7ul3s/fix_for_server_is_not_responding_error/
+
+Later versions of the plugin were distributed in binary form (dll) among the
+Space Engineers community but, to our knowledge, without source.
+The purpose of this repository is to present the source of the latest known
+version of the plugin, for inclusion in the [Plugin Hub][pluginhub] of
+[Plugin Loader][pluginloader].
+
+[pluginloader]: https://github.com/sepluginloader/PluginLoader
+[pluginhub]: https://github.com/sepluginloader/PluginHub
+
+## Credits
+
+All credits to Space Engineers community member _rexxar_.
+
+## Bugs, comments, questions
+
+Create a [new issue][issue].
+
+[issue]: https://github.com/StalkR/Space-Engineers-Timeout-Fix/issues/new