trunk,nnet1: changing comment to the --label option



git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4567 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: In Speaker ID setup added options for deltas (the new default is delta-window=3, delta-order=2) and updated the comments to reflect the change in accuracy. Also fixed script egs/sre08/v1/local/score_sre08.sh so that condition 0 is the average of the eight SRE08 conditions.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4568 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8