SWZ: move mex code to new ms-sbvar dir and rename swz to ms-sbvar

matlab/ms-sbvar/bin/.gitignore

...b/ms-sbvar/c-code/sbvar/switching/MarkovStateVariable.dat

matlab/ms-sbvar/c-code/sbvar/switching/switch.c

matlab/ms-sbvar/c-code/sbvar/switching/switch.h

matlab/ms-sbvar/c-code/sbvar/switching/switch_opt.c

matlab/ms-sbvar/c-code/sbvar/switching/switch_opt.h

matlab/ms-sbvar/c-code/sbvar/switching/switchio.c

matlab/ms-sbvar/c-code/sbvar/switching/switchio.h

matlab/ms-sbvar/c-code/sbvar/var/PrintDraws.c

matlab/ms-sbvar/c-code/sbvar/var/VARbase.c

matlab/ms-sbvar/c-code/sbvar/var/VARbase.h

matlab/ms-sbvar/c-code/sbvar/var/VARio.c

matlab/ms-sbvar/c-code/sbvar/var/VARio.h

matlab/ms-sbvar/c-code/sbvar/var/VARio_matlab.c

matlab/ms-sbvar/c-code/sbvar/var/VARio_matlab.h

matlab/ms-sbvar/c-code/sbvar/var/command_line_VAR.c

matlab/ms-sbvar/c-code/sbvar/var/command_line_VAR.h

matlab/ms-sbvar/c-code/sbvar/var/create_init_file.c

matlab/ms-sbvar/c-code/sbvar/var/estimate.c

matlab/ms-sbvar/c-code/sbvar/var/forecast.c