Removed unused variable.
Changed the logic for mh-history files (keep track of all the previous estimations if load_mh_file is used). Various bug fixes and cosmetic changes.
Solve backward compatibility issues for mh-history files. Fixes #537.
Fixed bug of unknown origin...
Merge branch 'master' into fix-mcmc-algorithm
Fixed bug (missing output argument).
Removed check_presence_consecutive_MC_files in McMCDiagnostics. Cosmetic changes.
Merge branch 'master' into fix-mcmc-algorithm
Added options to the internals command to load mh-history files or display informations about MCMC settings and state.

For instance, assuming that fs2000a.mod is in the current Matlab/Octave's directory and that a metropolis has been run,
the following command:

>> internals --display-mh-history fs2000a

produces the following output in the Matlab/Octave's command window:

================================
MCMC set-up for fs2000a mod file
================================

MCMC chain number 1:
--------------------

 o Number of MCMC files is 1
 o Number of draws is 6000
 o Acceptance ratio is 35.28%
 o Last value of the posterior kernel is: 1221.81656
 o State of the chain:

       || Initial | Current
   ++++++++++++++++++++++++
   e_a || 0.01570 | 0.01608
   e_m || 0.00528 | 0.00512
   alp || 0.35026 | 0.36909
   bet || 0.99300 | 0.99308
   gam || 0.00086 | 0.00038
   mst || 1.00088 | 1.00147
   rho || 0.65926 | 0.71132
   psi || 0.66428 | 0.60611
   del || 0.00977 | 0.00198

MCMC chain number 2:
--------------------

 o Number of MCMC files is 1
 o Number of draws is 6000
 o Acceptance ratio is 33.38%
 o Last value of the posterior kernel is: 1220.39229
 o State of the chain:

       || Initial | Current
   +++++++++++++++++++++++++
   e_a || 0.01664 |  0.01576
   e_m || 0.00489 |  0.00504
   alp || 0.39701 |  0.36630
   bet || 0.99305 |  0.99219
   gam || 0.00067 | -0.00025
   mst || 1.00186 |  1.00218
   rho || 0.70060 |  0.63847
   psi || 0.65623 |  0.74668
   del || 0.00666 |  0.00842

while the command:

>> internals --load-mh-history

loads the content of the record structure (saved in the last mh-history file) in Matlab/Octave's workspace
under the name mcmc_informations.
Renamed record.InitialLogLiK as record.InitialLogPost.
Also display the initial value of the posterior kernel, when internals --display-mh-history command is used.
Removed MC_record field from oo_ structure and the output argument from MCMC routines.

Details about the MCMC can be loaded in the workspace with the following command:

>> internals --load-mh-history <NAME_OF_THE_MOD_FILE>

under the name mcmc_informations, or printed in the command window, using the following
command:

>> internals --display-mh-history <NAME_OF_THE_MOD_FILE>
Bug fix (internals command with --load-mh-history option).
Changed chapter nine. Description of internals command.
Merge branch 'master' into fix-mcmc-algorithm
Cosmetic change. Renamed "acceptation rates" as "acceptance ratios".
internals --display-mh-history displays the overall acceptance ratios (ie using all the mcmc draws saved on disk) instead of the current acceptance ratios (ie using the mcmc draws generated by the last estimation command). Graphical and text waitbars display the current acceptance ratios. The current acceptance ratios are saved in the mh-history files.
Changed the error message issued when the initial conditions for the estimated parameters are outside the bounds (the error message depends on the value of options_.prior_trunc).
Closes #543.
Merge branch 'master' into fix-mcmc-algorithm