Added #ifdef around a variable declaration in state_point module.
Only call tally_statistics if more than one active batch is used.
Simplify multiplying of tally uncertainties by t-value.
Fix reporting of confidence interval on average keff.
Use N-3 degrees of freedom for combined k estimator.
Updated email in man page.
Remove special run mode --tallies.
Merged in latest changes to master
Changed commandline flag from -k to -t