Added simple example for creating data for WEKA

git-svn-id: http://lire.googlecode.com/svn/trunk@177 f280a053-6817-128d-8a7e-cdf98506035a
Treating deleted docs correctly.

git-svn-id: http://lire.googlecode.com/svn/trunk@178 f280a053-6817-128d-8a7e-cdf98506035a