allow for setting base folder for include files
allow for setting base folder for include files

also remove gutil that is not being used in the file

patlux/gulp-preprocess,yesmeck/gulp-preprocess,activenode/gulp-preprocess,jhtep/gulp-preprocess,patlux/gulp-preprocess,arma-gast/gulp-preprocess,terkill/gulp-preprocess,terkill/gulp-preprocess,jhtep/gulp-preprocess,yesmeck/gulp-preprocess,arma-gast/gulp-preprocess,activenode/gulp-preprocess