Merge pull request #305 from JohannesPfeifer/master

Bugfix in Posterior IRFs
Merge pull request #311 from JohannesPfeifer/master

Speeding up of forecasting, cosmetic change
Fix bug introduced in ae82c28
Remove obsolete section about smoother on calibrated models.

We now have the `calib_smoother' command.
Remove spurious display when there is zero preprocessor warning
Remove unused field n_exog of DynamicModelDLL class
Construct the filename of the dynamic MEX file only at the deepest level

In the calling chain, only pass the basename of the MOD file.
Implementation of steady state computation in estim DLL, using the GSL

Does not seem very robust (fails on fs2000), need to investigate why.
Start refactoring of penalty handling

Handle all events that lead to a penalty through an exception.
Next steps:
- make all exceptions derive from a common class containing info code and
  penalty value
- catch these exceptions at the top-level, and construct the penalty-adjusted
  likelihood
reporting (WIP)
More explicit error message when posterior mode file is outdated
oo_.PosteriorTheoreticalMoments.correlation contains autocorrelations
Fix typo
Added merge method to dynSeries class.
Fixed bug + Cosmetic changes.
Call merge method, added unitary tests.
Allows syntax like db = A.data(:,3:15), where A is a dynSeries object.
reporting: table
reporting: make errors more clear