fixed bugs in several features.

git-svn-id: http://lire.googlecode.com/svn/trunk@127 f280a053-6817-128d-8a7e-cdf98506035a
Added force option -f

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