Due to the use of variances for Sigma_e and subsequently backing out the standard deviation from these variances, the sign of the standard deviation does not matter and no bound needs to be imposed.
The commit moves the creation of results tables, both the ones displayed
and printed to LaTeX, from dynare_estimation_1.m to a separate function.
This factorization later allows to use this function to display results
from other estimation routines. At the same time, it removes the display
of t-statistics for posterior estimates ( #339 )