Make check.m display error messages

Fixes #619
Update the manual information on the deterministic solver

The Laffargue-Boucekkine-Juillard algorithm is not the default anymore
Merge pull request #625 from JohannesPfeifer/check_fix

Check fix
Verify types of the symbols in estimated_params{,_init,_bounds} statements.

Closes #624
Forbid MOD file names that are too long.

And rename filenames in the testsuite that are too long.

Closes #626
Fixed bug introduced in commit bb18c9386d41c365cedbb6784f854c53638541c0.
Upgrade to a newer version of the AX_BOOST_BASE macro.

Our workaround for cross-compilation has been incorporated upstream.
Upgrade macros AX_{BLAS,LAPACK,COMPARE_VERSION,PTHREAD}.
Release notes for Dynare 4.4.2.
Merge pull request #627 from JohannesPfeifer/master

Fix bug in evaluation of steady state file
Fix release announcement, #598 is not yet fixed.
Add option mh_conf_sig

Fixes #598
Merge pull request #629 from JohannesPfeifer/mh_conf_sig

Add option mh_conf_sig
adding ramsey_model to Dynare grammar
adding ramsey_model to ParsingDriver
adding ramsey_model to ComputingTasks
finishing ramsey_model implementation
updating the documentation for ramsey_model
Trust-region solver is now the default solver.
Change initial values to accomodate the change of default solver.