Merge pull request #593 from JohannesPfeifer/4.4

Fix sample on which Geweke convergence diagnostics is computed
dseries: allow assign to select by date string as opposed to dates
(cherry picked from commit 3f5d18f5c5e79dbc8715d777456a1709f83a9090)
Add a warning about the choice of the MOD file name.
(cherry picked from commit b3859bd763fb3cf93a65a8fe7194ad341966203c)
Add missing whitespace.
(cherry picked from commit 0d9a9d44c3ca6dcda9cbad99532c71af2ae4b586)
Fix handling of qz_criterium in k_order_perturbation MEX.

If the MEX file was called with options_.qz_criterium=[], it would not use a
correct default value (but would use NaN).

Closes #574
(cherry picked from commit e5d4defb4151ac105fb4857307678ab4a7ed15b8)
Fix bug when unit root models provide NaN's or Inf's in g_omega

(cherry picked from commit b33da9a40d1effc708661c12bf3a3077878ad332)
Merge pull request #604 from rattoma/4.4

HP-filtered moments: Fix bug when unit root models provide NaN's or Inf's in g_omega
removed useless test with exist() that is very expensive in
Octave (but apparently not in Matlab)

(cherry picked from commit c1e0d68351527153960a988087abcc316e2b17ff)
Fixed bug. Closes #591.
(cherry picked from commit 5f46f983c13e21c52358667913ed1b84a6a374d2)
Fixed bug. Closes #590.
(cherry picked from commit 4254da0a0080df66cb99a662d020e8ed0230a5f0)
Mention in the manual that a subsample can be created out of a dseries object using the overloaded parenthesis. Closes #589.
(cherry picked from commit 681b194cbef5ab3e3f7479d5615e1478c46f26ee)
Filter out use of loglinear with simulated moments

Does not work because steady state is not logged
(cherry picked from commit dfd9e3819bfe1577926b231f8847c0ee2efdbdb8)
Fix option loglinear for stoch_simul.m by also logging steady state.

Must be done to assure correct simulations and output of moments. Cannot be done in the solver itself as estimation performs logging of steady state also outside of solver
(cherry picked from commit 3da8e92aa55c4e4ffe447085090c1aad99d8c78a)
Clarify the role of the loglinear option for stoch_simul
(cherry picked from commit 6575d5ab5e2a8b2640ed369f0105dbdf67858038)
Make sure repeated runs of stoch_simul.m with loglinear option do not crash due to logged steady state
(cherry picked from commit 15f0353d0221609d5dc0afaf268f8470cb9b1bb5)
Add unit test for loglinear option
(cherry picked from commit 9885a31587b01272e5b18554aa3c9d82d5e7ac77)
Make sure that estimation works after loglinear option in stoch_simul with initval-block

stoch_simul logs the steady state. Here, it is transformed back
(cherry picked from commit 4bd7f4952a94db027c6fc1a6ed6451b46b4468bf)
Check if the steady state is strictly positive when simulating/estimating a model with loglinear option.
(cherry picked from commit 62aa9b8fa537498375269552c84180a05e2091a4)
Clarify prefilter option in estimation
(cherry picked from commit e054c5c322d47aede0978bfd97b89c33977f1901)
Document treatment of missing observations
Closes #286
(cherry picked from commit 2c36898dc494c916e80b872ab0e88c837a321f7d)