Added autotools build system.

configure.ac

@@ -0,0 +1,57 @@
+AC_PREREQ(2.63)
+dnl be carefull, the version needs to be in sync with your gnome shell version
+AC_INIT([gnome-shell-extension-sensors],[1.3],[https://github.com/xtranophilist/gnome-shell-extension-sensorsi/issues])
+
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_AUX_DIR([config])
+
+AM_INIT_AUTOMAKE([1.10 dist-xz foreign])
+
+m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
+
+AC_PROG_SED
+
+PKG_PROG_PKG_CONFIG([0.22])
+
+GLIB_GSETTINGS
+
+AC_ARG_WITH(desktop-dir, [  --with-desktop-dir=PATH where to install desktop files (default=PREFIX/share)])
+
+if test "x$with_desktop_dir" != x; then
+  DESKTOP_DATADIR=$with_desktop_dir
+else
+  DESKTOP_DATADIR="$datadir"
+fi
+
+AM_CONDITIONAL(DESKTOP_DATADIR, test "x$with_desktop_dir" != xno)
+AC_SUBST(DESKTOP_DATADIR)
+
+AC_ARG_WITH([local-install],
+	     [AS_HELP_STRING([--with-local-install],
+			     [install schemas and translations in a subdir of the extension (default is no)])],
+	     [use_local_install=$withval],
+	     [use_local_install=no])
+
+AC_SUBST(use_local_install)
+AM_CONDITIONAL(LOCAL_INSTALL, test "x${use_local_install}" == "xyes")
+
+extensiontopdir=${datadir}/gnome-shell/extensions/weather@gnome-shell-extensions.gnome.org
+
+dnl This is beyond ugly. Suggestions accepted.
+if test "x${use_local_install}" == "xyes"; then
+   AC_SUBST(gsettingsschemadir, [${extensiontopdir}/schemas])
+fi
+
+dnl Please keep this sorted alphabetically.
+AC_CONFIG_FILES([
+  Makefile
+  data/Makefile
+  src/Makefile
+])
+AC_OUTPUT
+
+if test "x$use_local_install" == "xyes"; then
+   echo
+   echo "The schemas will be installed in subdirectories of the extension."
+   echo
+fi