Added a README file regarding WinRT support

To note, this file is currently formatted with CRLF line endings, rather than
LF, to allow the file to be viewed with Notepad.

Xcode/SDL/pkg-support/codesign-frameworks.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+
+# WARNING: You may have to run Clean in Xcode after changing CODE_SIGN_IDENTITY! 
+
+# Verify that $CODE_SIGN_IDENTITY is set
+if [ -z "$CODE_SIGN_IDENTITY" ] ; then
+    echo "CODE_SIGN_IDENTITY needs to be non-empty for codesigning frameworks!"
+
+    if [ "$CONFIGURATION" = "Release" ] ; then
+        exit 1
+    else
+        # Codesigning is optional for non-release builds.
+        exit 0
+    fi
+fi
+
+SAVEIFS=$IFS
+IFS=$(echo -en "\n\b")
+
+FRAMEWORK_DIR="${TARGET_BUILD_DIR}"
+
+# Loop through all frameworks
+FRAMEWORKS=`find "${FRAMEWORK_DIR}" -type d -name "*.framework" | sed -e "s/\(.*\)/\1\/Versions\/A\//"`
+RESULT=$?
+if [[ $RESULT != 0 ]] ; then
+    exit 1
+fi
+
+echo "Found:"
+echo "${FRAMEWORKS}"
+
+for FRAMEWORK in $FRAMEWORKS;
+do
+    echo "Signing '${FRAMEWORK}'"
+    `codesign -f -v -s "${CODE_SIGN_IDENTITY}" "${FRAMEWORK}"`
+    RESULT=$?
+    if [[ $RESULT != 0 ]] ; then
+        exit 1
+    fi
+done
+
+# restore $IFS
+IFS=$SAVEIFS