add stream deck example README

examples/streamdeck/README.md

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+# About
+
+Thanks to the guys at [Start Automating](https://startautomating.com/) it's possible to use this module straight from your Stream Deck.
+
+## Requirements
+
+-   [Windows ScriptDeck](https://marketplace.elgato.com/product/windows-scriptdeck-857f01dd-8fd4-44d5-8ec7-67ac850b21d3)
+
+## How
+
+Once ScriptDeck is installed create a button using *Powershell Script*, then:
+
+### On one button
+
+Due to the design of Voicemeeter's API you may only login/logout once per session so in order to program multiple buttons you must do the following for just ONE button (it can be any button).
+
+#### Button 1
+
+*When Loaded*
+
+```powershell
+$global:vmr = Connect-Voicemeeter -Kind "banana"
+```
+
+*When Unloaded*
+
+```powershell
+Disconnect-Voicemeeter
+```
+
+*When Pressed*
+
+```powershell
+if ($vmr.strip[0].mute) {
+$vmr.bus[0].mute=1
+$vmr.bus[1].mute=1
+} else {
+$vmr.bus[0].mute=0
+$vmr.bus[1].mute=0
+}
+```
+
+### Other buttons
+
+Then your other buttons can have any scripts using the `$vmr` object:
+
+#### Button 2
+
+*When Pressed*
+
+```powershell
+$vmr.strip[1].mute=1
+$vmr.strip[2].mute=1
+
+if (-not $vmr.strip[0].mute) {
+$vmr.strip[0].mute=1
+}
+```
+
+#### Button 3
+
+*When Pressed*
+
+```powershell
+$vmr.strip[1].mute=0
+$vmr.strip[2].mute=0
+
+if ($vmr.strip[0].mute) {
+$vmr.strip[0].mute=0
+}
+```
+
+---
+
+Then let's say you have zillions of buttons you want to program, for each Stream Deck window configure ONE button as described above and the other buttons of the same window as described above.
+
+If this explanation is unclear or you'd like me to add some screenshots just ask.