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/cvchaincode.cpp

@@ -0,0 +1,49 @@
+/************************************************************
+
+   cvchaincode.cpp -
+
+   $Author: lsxi $
+
+   Copyright (C) 2007 Masakazu Yonekura
+
+************************************************************/
+#include "cvchaincode.h"
+/*
+ * Document-class: OpenCV::CvChainCode
+ *
+ * Freeman chain code.
+ */
+__NAMESPACE_BEGIN_OPENCV
+__NAMESPACE_BEGIN_CVCHAINCODE
+
+VALUE rb_klass;
+
+VALUE
+rb_class()
+{
+  return rb_klass;
+}
+
+void
+define_ruby_class()
+{
+  if (rb_klass)
+    return;
+  /* 
+   * opencv = rb_define_module("OpenCV");
+   * 
+   * note: this comment is used by rdoc.
+   */
+  VALUE opencv = rb_module_opencv();
+  
+  rb_klass = rb_define_class_under(opencv, "CvChainCode", rb_cObject);
+}
+
+VALUE
+rb_to_i(VALUE self)
+{
+  return CHR2FIX(CVCHAINCODE(self)->code);
+}
+
+__NAMESPACE_END_CVCHAINCODE
+__NAMESPACE_END_OPENCV