Update readme.md (#2)

readme.md

@@ -13,7 +13,7 @@
 -- *split_main.sh* in turn submits *split_grp.sh* which in turns runs *split_grp.py* in array job fashion. Every task in the array job processes one slide.
 - qsub split_main.sh ./config_normal.txt  
 - qsub split_main.sh ./config_tumor.txt  
-
+The files mentioned above are located under image_patch_extract.
 ## 1.2 Create lookup tables
 - bash create_lookup_grp.sh ./config_testing.txt  
 - bash create_lookup_grp.sh ./config_normal.txt