Added Readme

Readme.md

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+# GC4iOS -  GameCube emulator for iOS
+
+GC4iOS
+=======
+###### Supports iOS 8.1 and up. 64 bit devices only.
+
+Currently GC4iOS uses Dolphin's' PowerPC Interpreter and an OpenGL backend. Most games can be loaded and run between 3 and 20 fps. 
+
+Only devices with 2GB of ram have been tested (iPhone 6s, ect). Devices with 1GB may work but have not been tested.
+
+Please note this is an early alpha version. Without JIT, the emulator will not be fast enough to play any games at a playable speed.
+
+Installing GC4iOS
+------------------------
+Download the source and open the project file in the root directory. Set your device as the build target and press build and run. 
+
+
+
+To-do
+------------------------
+###### Planned improvments
+* Customizeable controller
+* Net Play
+* Cheats
+* JIT