Added configuration file system.

Uses QSettings on citra-qt, and inih on citra-cli.

src/core/settings.h

@@ -0,0 +1,29 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Settings {
+
+struct Values {
+    int pad_a_key;
+    int pad_b_key;
+    int pad_x_key;
+    int pad_y_key;
+    int pad_l_key;
+    int pad_r_key;
+    int pad_start_key;
+    int pad_select_key;
+    int pad_home_key;
+    int pad_dup_key;
+    int pad_ddown_key;
+    int pad_dleft_key;
+    int pad_dright_key;
+    int pad_sup_key;
+    int pad_sdown_key;
+    int pad_sleft_key;
+    int pad_sright_key;
+} extern values;
+
+}