New Formula: Dynare 4.4.3

Following up on #697, we have created a make install.

Given that we already waited 4 months to have #697 reviewed, I would greatly appreciate it if you could move this up on your priority list.
No, because of ```system "make", "pdf"``` in the bottom of the ```if build.with? "doc"``` statement. There is a problem with ```make pdf``` on os x because autoconf splits the texi2pdf command across two lines and os x dosen't support that.