Print about lzma in help

git-svn-id: http://xdelta.googlecode.com/svn/trunk@409 a3eca27d-f21b-0410-9b4a-6511e771f64e
Remove generic encoding table support

git-svn-id: http://xdelta.googlecode.com/svn/trunk@410 a3eca27d-f21b-0410-9b4a-6511e771f64e