TWRP-ify AOSP code

Pull in most TWRP sources
Stub out partition management code
Make it compile -- probably will not boot
Kind of a mess but have to start somewhere
diff --git a/gui/image.cpp b/gui/image.cpp
new file mode 100644
index 0000000..44400e6
--- /dev/null
+++ b/gui/image.cpp
@@ -0,0 +1,90 @@
+// image.cpp - GUIImage object
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/reboot.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <string>
+
+extern "C" {
+#include "../common.h"
+#include "../minuitwrp/minui.h"
+#include "../recovery_ui.h"
+}
+
+#include "rapidxml.hpp"
+#include "objects.hpp"
+
+GUIImage::GUIImage(xml_node<>* node)
+{
+    xml_attribute<>* attr;
+    xml_node<>* child;
+
+    mImage = NULL;
+
+    if (!node)
+        return;
+
+    child = node->first_node("image");
+    if (child)
+    {
+        attr = child->first_attribute("resource");
+        if (attr)
+            mImage = PageManager::FindResource(attr->value());
+    }
+
+    // Load the placement
+    LoadPlacement(node->first_node("placement"), &mRenderX, &mRenderY, NULL, NULL, &mPlacement);
+
+    if (mImage && mImage->GetResource())
+    {
+        mRenderW = gr_get_width(mImage->GetResource());
+        mRenderH = gr_get_height(mImage->GetResource());
+
+        // Adjust for placement
+        if (mPlacement != TOP_LEFT && mPlacement != BOTTOM_LEFT)
+        {
+            if (mPlacement == CENTER)
+                mRenderX -= (mRenderW / 2);
+            else
+                mRenderX -= mRenderW;
+        }
+        if (mPlacement != TOP_LEFT && mPlacement != TOP_RIGHT)
+        {
+            if (mPlacement == CENTER)
+                mRenderY -= (mRenderH / 2);
+            else
+                mRenderY -= mRenderH;
+        }
+        SetPlacement(TOP_LEFT);
+    }
+
+    return;
+}
+
+int GUIImage::Render(void)
+{
+    if (!mImage || !mImage->GetResource())      return -1;
+    gr_blit(mImage->GetResource(), 0, 0, mRenderW, mRenderH, mRenderX, mRenderY);
+    return 0;
+}
+
+int GUIImage::SetRenderPos(int x, int y, int w, int h)
+{
+    if (w || h)     return -1;
+    mRenderX = x;
+    mRenderY = y;
+    return 0;
+}
+