Add Changelog, put version to 0.3 David Cournapeau...

Add Changelog, put version to 0.3 David Cournapeau <david@ar.media.kyoto-u.ac.jp> | 2006-07-13 19:51:04 +0900 (Thu, 13 Jul 2006)

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

git-svn-id: https://scikit-learn.svn.sourceforge.net/svnroot/scikit-learn/trunk@70 22fbfee3-77ab-4535-9bad-27d1bd3bc7d8