Added toXml methods for saving rules, cats and morph items.
Minor update to finish toXml stuff.
Changed toXml to ignore indices with hylo vars.
Likewise changed satop toXml to ignore indices on nomvars.
Turned off use of norm_blue in n-best output, adding -nbestnormbleu switch to turn it back on if desired.
Added nbest output with lfs for parsing and realization.