Update README.txt

cubes/README.txt

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  *       IMPORTANT      *
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-1) Fact table must have 'Facts' name
-2) the id columns must have _id at the end (product_id, person_id...)
-3) each column name of each table must be unique from the other tables column names
-4) the columns name must be in a good order (hierarchy)
-5) use a simple star modele with one key and numeric measures ( the other cases not tested yet)
-6) verify that data entered in tables does not contains any white spaces at the end
-7) if you want to set up some orders to the tables , put the desired order with tables name , for exmple 1Geography.csv , 2Product.csv .... [ useful for excel level display]
-8) time dimension must be named 'Time'
+1) the id columns must have _id at the end (product_id, person_id...)
+2) each table's column name must be unique from the other tables column names
+3) the columns name must be in a good order (hierarchy)
+4) use a simple star modele with one key and numeric measures ( the other cases not tested yet)
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