Add figure title for rplot
Clarify theoretical second moments for order=2

Eliminates warning message introduced in
4c8f3a89cc91ef301cf2a20d68d7dfb0cb983254
Adds hint to approximation in table title and adds the information with
a reference to Kim/Kim/Schaumburg/Sims (2008) to manual.
closes #278
Restrict endogenous prior to stationary models and allow for measurement error
Merge pull request #325 from JohannesPfeifer/master

Clarification for second moments at second order and to rplot; restriction of endogenous prior to stationary models
reporting: @page: allow for multiple titles, title_format, first args can be provided as strings or cellstr, multiple args as cellstr
reporting: @table: simplify code
reporting: add centering
reporting: @table: only print given date range
1) fixed bugs when no estimated parameters are declared;
2) fixed bug for the ML base (bayestopt_.pshape==0);
3) make more transparent the error when the model does not solve at prior_mode or  prior_mean;
4) when prior_mean or prior_mode fail, try 50 times with randomly generated samples from the prior before interrupting identification.

This commit fixes issues related to fabiac forum request and subsequent discussion with Johannes.

http://www.dynare.org/phpBB3/viewtopic.php?f=1&t=4402&p=10771&hilit=identification&sid=64c6f9d987a2641e79dd5722137eb483#p10771