Added support for folds in the same file

[apik]

Can be used as:

include # foldname

Here is a code example (to be placed in file unnamedfold.frm):

#-

#include unnamedfold.frm # f1

#include # f1

.end

*--#[ f1 :
        #message fold included
*--#] f1 :

[tueda]

It looks like a syntax sugar of

#include `NAME_' # f1

[apik]

I agree with you and going to close pull request, just forgotten about preprocessor variables.