Add manifest, appdata and screenshots

appdata.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright 2016 Jeremy Newton -->
+<application>
+  <id type="desktop">dolphin-emu.desktop</id>
+  <name>Dolphin Emulator</name>
+  <summary>GameCube / Wii / Triforce Emulator</summary>
+  <metadata_license>CC-BY-SA-3.0</metadata_license>
+  <project_license>GPL-2.0+</project_license>
+  <description>
+    <p>
+      Dolphin is a Gamecube, Wii and Triforce (the arcade machine based on the
+      Gamecube) emulator, which supports full HD video with several enhancements such
+      as compatibility with all PC controllers, turbo speed, networked multiplayer,
+      and more. Most games run perfectly or with minor bugs.
+    </p>
+  </description>
+  <url type="homepage">https://dolphin-emu.org/</url>
+  <url type="bugtracker">https://bugs.dolphin-emu.org/projects/emulator/issues</url>
+  <screenshots>
+    <screenshot type="default">https://raw.githubusercontent.com/flathub/org.DolphinEmu.dolphin-emu/master/screenshots/1.png</screenshot>
+    <screenshot >https://raw.githubusercontent.com/flathub/org.DolphinEmu.dolphin-emu/master/screenshots/2.png</screenshot>
+    <screenshot >https://raw.githubusercontent.com/flathub/org.DolphinEmu.dolphin-emu/master/screenshots/3.png</screenshot>
+    <screenshot >https://raw.githubusercontent.com/flathub/org.DolphinEmu.dolphin-emu/master/screenshots/3.png</screenshot>
+  </screenshots>
+  <update_contact>b@bpiotrowski.pl</update_contact>
+</application>

org.DolphinEmu.dolphin-emu.json

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+{
+  "app-id": "org.DolphinEmu.dolphin-emu",
+  "version": "5.0",
+  "branch": "master",
+  "runtime": "org.gnome.Platform",
+  "runtime-version": "3.24",
+  "sdk": "org.gnome.Sdk",
+  "command": "dolphin-emu",
+  "rename-desktop-file": "dolphin-emu.desktop",
+  "rename-icon": "dolphin-emu",
+  "rename-appdata-file": "dolphin-emu.appdata.xml",
+  "finish-args": [
+    "--device=dri",
+    "--filesystem=home:ro",
+    "--socket=pulseaudio",
+    "--socket=wayland",
+    "--socket=x11",
+    "--share=network"
+  ],
+  "modules": [
+    {
+      "name": "dolphin-emu",
+      "buildsystem": "cmake",
+      "config-opts": [
+        "-DENABLE_SDL=ON",
+        "-DENABLE_EVDEV=OFF"
+      ],
+      "post-install": [
+        "install -Dm644 appdata.xml /app/share/appdata/dolphin-emu.appdata.xml"
+      ],
+      "sources": [
+        {
+          "type": "archive",
+          "url": "https://github.com/dolphin-emu/dolphin/archive/5.0.tar.gz",
+          "sha256": "62c4602055767ab314ff50a3b94ea57f792832aa1629e6b1117ebce10518dc0b"
+        },
+        {
+          "type": "file",
+          "path": "appdata.xml"
+        }
+      ]
+    }
+  ]
+}