Added README

README.md

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+[![GPLv2 License](http://img.shields.io/badge/license-GPLv3-brightgreen.svg)](https://tldrlegal.com/license/gnu-general-public-license-v3-(gpl-3))
+
+# SDR# R820T Improved Plugin
+
+This is a reconstruction of R820T Plugin for SDR#. This should be a in-place replace plugin fully compatible with the other `SDRSharp.R820T.dll` file.
+
+# How to use it
+
+Download the latest release here in github. It will include the necessary `SDRSharp.R820T.dll` and `librtlsdr.dll`
+
+# How to compile it
+
+Download Visual Studio 2016 (it works in Express) and set the reference path for `SDRSharp.Radio` in the solution `References`. You will also need our development release of librtlsdr (see https://github.com/librtlsdr/librtlsdr )
+
+# TODO List
+
+*   ~~Full reconstruction~~
+*   ~~Bias T Support for RTLSDR V.3 Dongles~~
+*   Bandwidth Selector
+
+
+I hope you enjoy it!