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/cvmemstorage.cpp

@@ -0,0 +1,63 @@
+/************************************************************
+
+   cvmemstorage.cpp -
+
+   $Author: lsxi $
+
+   Copyright (C) 2005 Masakazu Yonekura
+
+************************************************************/
+#include "cvmemstorage.h"
+/*
+ * Document-class: OpenCV::CvMemStorage
+ *
+ * Internal memory management class used by CvSeq.
+ */
+__NAMESPACE_BEGIN_OPENCV
+__NAMESPACE_BEGIN_CVMEMSTORAGE
+
+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, "CvMemStorage", rb_cObject);
+}
+
+VALUE
+rb_allocate(VALUE klass)
+{
+  CvMemStorage *storage = cvCreateMemStorage();
+  return Data_Wrap_Struct(klass, 0, cvmemstorage_free, storage);
+}
+
+void
+cvmemstorage_free(void *ptr)
+{
+  cvReleaseMemStorage((CvMemStorage**)&ptr);
+}
+
+VALUE
+new_object(int blocksize)
+{
+  CvMemStorage *storage = cvCreateMemStorage(blocksize);
+  return Data_Wrap_Struct(rb_klass, 0, cvmemstorage_free, storage);
+}
+
+
+__NAMESPACE_END_CVMEMSTORAGE
+__NAMESPACE_END_OPENCV