One Solve File Flag Mode

This mode is intended for larger simulation sweeps (>100s). Normally, a parameter mat file and solve m/mex file is created for every simulation. For large simulations, this takes lots of time to make and takes up storage space. This mode reduces the amount of files created to only 1 of each type.

It has some limitations:

• Won't update studyinfo.mat with progress
• Doesn't yet work with parfor_flag
• Allows non-numeric data types like character cells in vary statements if not using mex_flag. When using mex_flag, vary parameters must be numeric arrays.