Massive refactoring of all code + audio skeleton.

This should make it easier to find files and (in the future) split things
up into separate libraries.
It also changes around emulator initialization to make it a little more
difficult to do things out of order and a little more sensible as to when
real init work happens.
Also adding a skeleton audio system/driver and reworking CPU register
access to be more extensible.

src/xenia/kernel/xam/xam_state.cc

@@ -0,0 +1,33 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <xenia/kernel/xam/xam_state.h>
+
+#include <xenia/emulator.h>
+
+
+using namespace xe;
+using namespace xe::kernel;
+using namespace xe::kernel::xam;
+
+
+namespace {
+
+}
+
+
+XamState::XamState(Emulator* emulator) :
+    emulator_(emulator) {
+  memory_ = xe_memory_retain(emulator->memory());
+  export_resolver_ = emulator->export_resolver();
+}
+
+XamState::~XamState() {
+  xe_memory_release(memory_);
+}