Added gemspec to be able to bundle install from git.

Added IplImage#smoothness that returns :smooth, :messy, or :blank.
Rake compile will now compile the C extension code.

ext/opencv/cvmatnd.cpp

@@ -0,0 +1,44 @@
+/***********************************************************
+
+   cvmatnd.cpp -
+
+   $Author: lsxi $
+
+   Copyright (C) 2007 Masakazu Yonekura
+
+************************************************************/
+#include "cvmatnd.h"
+/*
+ * Document-class: OpenCV::CvMatND
+ *
+ */
+__NAMESPACE_BEGIN_OPENCV
+__NAMESPACE_BEGIN_CVMATND
+
+VALUE rb_klass;
+
+VALUE
+rb_class()
+{
+  return rb_klass;
+}
+
+void
+define_ruby_class()
+{
+  if (rb_klass)
+    return;
+  /* 
+   * opencv = rb_define_module("OpenCV");
+   * cvmat = rb_define_class_under(opencv, "CvMat", rb_cObject);
+   *
+   * note: this comment is used by rdoc.
+   */
+  VALUE opencv = rb_module_opencv(), cvmat = cCvMat::rb_class();
+  
+  rb_klass = rb_define_class_under(opencv, "CvMatND", cvmat);
+}
+
+__NAMESPACE_END_CVMATND
+__NAMESPACE_END_OPENCV
+