Updated Home (markdown)

Home.md

@@ -1,9 +1,9 @@
-## Brief introduction
+<h2>Mission and expectations</h2>
 
-SDRangel uses [sample source plugins](/f4exb/sdrangel/wiki/Sample-source-plugins) to collect I/Q samples from a hardware device. Then in the passband returned possibly decimated one or more [channel Rx plugins](/f4exb/sdrangel/wiki/Channel-Rx-plugins) can be used to demodulate, decode or analyze some part of this spectrum.
+This software project is committed to Open Source that is you as a visitor, collaborator, simple user... will always be guaranteed access to the source code. You may fork this repository, change the code, take bits to use in another project or just run it. It is important to realize that source code is THE value of this software. Artifacts are considered as accessory. This is NOT free software as in free lunch and when you run it you are asked to collaborate to it to the best of your abilities.
 
-Conversely SDRangel uses [sample sink plugins](/f4exb/sdrangel/wiki/Sample-sink-plugins) to send I/Q samples to a hardware device. One or more [channel Tx plugins](/f4exb/sdrangel/wiki/Channel-Tx-plugins) can be used to produce modulated samples that are mixed into a transmission passband with possible subsequent interpolation before being sent to the device or written to file.
-
-You can check out the [discussion group](https://groups.io/g/sdrangel)
-
-The Main Window interface is described [here](https://github.com/f4exb/sdrangel/blob/master/sdrgui/readme.md)
+This software is provided in the hope it will be useful. Its main goal is to provide a Software Defined Radio platform that is is committed to:
+  - be efficient: code should be written to be conservative on CPU resources it is not because the CPU power of machines constantly increase that this power should be wasted
+  - have fast paced instrumental graphics. Thanks to OpenGL spectrum, signal graphics and images can be rendered responsively
+  - give power to the user by letting him/her control all aspects of the DSP processing chain. But as you know with greater power comes greater responsibility therefore it is expected that you already have some experience with SDR applications and digital signal processing in general
+  - be an experimental platform for amateur radio or anyone interested in matters related to electromagnetism or communication based on electromagnetic waves. It is in no way intended for production moreover mission critical usage.