minor fixes

README.md

@@ -1,9 +1,8 @@
 # ShfitedPowGMRES
 
-```bash
-mkdir data && cd data
-wget https://snap.stanford.edu/data/web-BerkStan.txt.gz
-wget https://snap.stanford.edu/data/web-Stanford.txt.gz
-gunzip web-Stanford.txt.gz
-gunzip web-BerkStan.txt.gz
-```
+Work in progress. In the actual version, the `main.py` works but only for the Algorithm 1 of the paper. It's suggested to use the first database.
+
+### TO DO:
+
+- [ ] Add the other algorithms
+- [ ] Use argparse to make the code more flexible in `load_data()`