Various cleanup, include ctypes version of diag gden; update profile function...

Various cleanup, include ctypes version of diag gden; update profile function to include ctypes version David Cournapeau <david@ar.media.kyoto-u.ac.jp> | 2006-08-28 22:03:28 +0900 (Mon, 28 Aug 2006)

From: cdavid <cdavid@cb17146a-f446-4be1-a4f7-bd7c5bb65646>

git-svn-id: https://scikit-learn.svn.sourceforge.net/svnroot/scikit-learn/trunk@78 22fbfee3-77ab-4535-9bad-27d1bd3bc7d8