re-organized joint histograms and minor corrections

git-svn-id: http://lire.googlecode.com/svn/trunk@106 f280a053-6817-128d-8a7e-cdf98506035a
re-organized joint histograms and minor corrections

git-svn-id: http://lire.googlecode.com/svn/trunk@107 f280a053-6817-128d-8a7e-cdf98506035a
re-organized joint histograms and minor corrections

git-svn-id: http://lire.googlecode.com/svn/trunk@108 f280a053-6817-128d-8a7e-cdf98506035a
re-organized joint histograms and minor corrections

git-svn-id: http://lire.googlecode.com/svn/trunk@109 f280a053-6817-128d-8a7e-cdf98506035a
re-organized joint histograms and minor corrections

git-svn-id: http://lire.googlecode.com/svn/trunk@110 f280a053-6817-128d-8a7e-cdf98506035a