Add QtIFW configuration & build files

dist/installer/README.md

@@ -0,0 +1,30 @@
+Citra Qt Installer
+==================
+
+This contains the configuration files for building Citra's installer.
+
+`packages` is empty as Qt expects that it gets a valid directory for offline
+ packages, even if you are a online-only installer.
+
+Installers can only be built on the platform that they are targeting.
+
+Windows
+-------
+
+Using Powershell 2.0 (Windows 10):
+
+```powershell
+cd dist\installer
+powershell –ExecutionPolicy Bypass .\build.ps1
+```
+
+Linux/Mac
+---------
+
+Curl + Bash must be available.
+
+```bash
+cd dist/installer
+chmod +x build.sh
+./build.sh
+```