Revert directory structure changes
diff --git a/libxml.m4 b/libxml.m4
new file mode 100644
index 0000000..1401af5
--- /dev/null
+++ b/libxml.m4
@@ -0,0 +1,148 @@
+dnl Code shamelessly stolen from glib-config by Sebastian Rittau
+dnl AM_PATH_XML([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
+AC_DEFUN(AM_PATH_XML,[
+AC_ARG_WITH(xml-prefix,
+            [  --with-xml-prefix=PFX    Prefix where libxml is installed (optional)],
+            xml_config_prefix="$withval", xml_config_prefix="")
+AC_ARG_ENABLE(xmltest,
+              [  --disable-xmltest        Do not try to compile and run a test XML program],,
+              enable_xmltest=yes)
+
+  if test x$xml_config_prefix != x ; then
+    xml_config_args="$xml_config_args --prefix=$xml_config_prefix"
+    if test x${XML_CONFIG+set} != xset ; then
+      XML_CONFIG=$xml_config_prefix/bin/xml-config
+    fi
+  fi
+
+  AC_PATH_PROG(XML_CONFIG, xml-config, no)
+  min_xml_version=ifelse([$1], ,2.0.0, [$1])
+  AC_MSG_CHECKING(for libxml - version >= $min_xml_version)
+  no_xml=""
+  if test "$XML_CONFIG" = "no" ; then
+    no_xml=yes
+  else
+    XML_CFLAGS=`$XML_CONFIG $xml_config_args --cflags`
+    XML_LIBS=`$XML_CONFIG $xml_config_args --libs`
+    xml_config_major_version=`$XML_CONFIG $xml_config_args --version | \
+      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
+    xml_config_minor_version=`$XML_CONFIG $xml_config_args --version | \
+      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
+    xml_config_micro_version=`$XML_CONFIG $xml_config_args --version | \
+      sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
+    if test "x$enable_xmltest" = "xyes" ; then
+      ac_save_CFLAGS="$CFLAGS"
+      ac_save_LIBS="$LIBS"
+      CFLAGS="$CFLAGS $XML_CFLAGS"
+      LIBS="$XML_LIBS $LIBS"
+dnl
+dnl Now check if the installed libxml is sufficiently new.
+dnl
+      rm -f conf.xmltest
+      AC_TRY_RUN([
+#include <stdlib.h>
+#include <stdio.h>
+#include <xmlversion.h>
+#include <parser.h>
+
+int
+main()
+{
+  int xml_major_version, xml_minor_version, xml_micro_version;
+  int major, minor, micro;
+  char *tmp_version;
+
+  system("touch conf.xmltest");
+
+  tmp_version = xmlStrdup("$min_xml_version");
+  if(sscanf(tmp_version, "%d.%d.%d", &major, &minor, &micro) != 3) {
+    printf("%s, bad version string\n", "$min_xml_version");
+    exit(1);
+  }
+
+  tmp_version = xmlStrdup(LIBXML_DOTTED_VERSION);
+  if(sscanf(tmp_version, "%d.%d.%d", &xml_major_version, &xml_minor_version, &xml_micro_version) != 3) {
+    printf("%s, bad version string\n", "$min_xml_version");
+    exit(1);
+  }
+
+  if((xml_major_version != $xml_config_major_version) ||
+     (xml_minor_version != $xml_config_minor_version) ||
+     (xml_micro_version != $xml_config_micro_version))
+    {
+      printf("\n*** 'xml-config --version' returned %d.%d.%d, but libxml (%d.%d.%d)\n", 
+             $xml_config_major_version, $xml_config_minor_version, $xml_config_micro_version,
+             xml_major_version, xml_minor_version, xml_micro_version);
+      printf("*** was found! If xml-config was correct, then it is best\n");
+      printf("*** to remove the old version of libxml. You may also be able to fix the error\n");
+      printf("*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing\n");
+      printf("*** /etc/ld.so.conf. Make sure you have run ldconfig if that is\n");
+      printf("*** required on your system.\n");
+      printf("*** If xml-config was wrong, set the environment variable XML_CONFIG\n");
+      printf("*** to point to the correct copy of xml-config, and remove the file config.cache\n");
+      printf("*** before re-running configure\n");
+    }
+  else
+    {
+      if ((xml_major_version > major) ||
+          ((xml_major_version == major) && (xml_minor_version > minor)) ||
+          ((xml_major_version == major) && (xml_minor_version == minor) &&
+           (xml_micro_version >= micro)))
+        {
+          return 0;
+        }
+      else
+        {
+          printf("\n*** An old version of libxml (%d.%d.%d) was found.\n",
+            xml_major_version, xml_minor_version, xml_micro_version);
+          printf("*** You need a version of libxml newer than %d.%d.%d. The latest version of\n",
+            major, minor, micro);
+          printf("*** libxml is always available from ftp://ftp.gnome.org.\n");
+          printf("***\n");
+          printf("*** If you have already installed a sufficiently new version, this error\n");
+          printf("*** probably means that the wrong copy of the xml-config shell script is\n");
+          printf("*** being found. The easiest way to fix this is to remove the old version\n");
+          printf("*** of libxml, but you can also set the XML_CONFIG environment to point to the\n");
+          printf("*** correct copy of xml-config. (In this case, you will have to\n");
+          printf("*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n");
+          printf("*** so that the correct libraries are found at run-time))\n");
+        }
+    }
+  return 1;
+}
+],, no_xml=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
+
+      CFLAGS="$ac_save_CFLAGS"
+      LIBS="$ac_save_LIBS"
+    fi
+  fi
+
+  if test "x$no_xml" = x ; then
+    AC_MSG_RESULT(yes)
+    ifelse([$2], , :, [$2])
+  else
+    AC_MSG_RESULT(no)
+    if test "$XML_CONFIG" = "no" ; then
+      echo "*** The xml-config script installed by libxml could not be found"
+      echo "*** If libxml was installed in PREFIX, make sure PREFIX/bin is in"
+      echo "*** your path, or set the XML_CONFIG environment variable to the"
+      echo "*** full path to xml-config."
+    else
+      if test -f conf.xmltest ; then
+        :
+      else
+        echo "*** Could not run libxml test program, checking why..."
+        CFLAGS="$CFLAGS $XML_CFLAGS"
+        LIBS="$LIBS $XML_LIBS"
+        dnl FIXME: AC_TRY_LINK
+      fi
+    fi
+
+    XML_CFLAGS=""
+    XML_LIBS=""
+    ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(XML_CFLAGS)
+  AC_SUBST(XML_LIBS)
+  rm -f conf.xmltest
+])