Include file stored as string variable

So this has just been fixed in unstable, and will be available in tomorrrow’s snapshot package.

To summarize, you need to do something of the order of the following in Matlab:

>> xy='/path/to/dir/with/other/modfile/';
>> dynare modfile.mod -Dpath=xy

and then, in your modfile, you’ll have:

@#define othermodfile=path+'othermodfile.mod'
@#include othermodfile