Move Xcode project to a separate tree parallel to src

pkg/gitrev.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+# Usage: gitrev.sh path-to-src
+
+REVID=`git rev-parse HEAD`;
+export FULLTAG=`git tag --sort=v:refname | tail -n1`;
+TAGREV=`git rev-parse $FULLTAG`;
+
+echo -e "\n#define GIT_REVISION \"${REVID:0:7}\"\n#define GIT_TAG \"$FULLTAG\"\n#define GIT_TAG_REVISION \"${TAGREV:0:7}\"\n" > "$1/tools/gitrev.hpp"