update README

Author: Mahdisadjadi

README.md

@@ -54,3 +54,6 @@ df = pd.DataFrame(output,columns=cols)
 
 ## Author
 Mahdi Sadjadi, 2017.
+
+##License
+This project is licensed under the MIT License - see the LICENSE.md file for details

todo.md

@@ -1,18 +1,11 @@
-# To-do list
+## To-do list (code)
 
 * Add command line option to run
 * Add functions to filter out the results of API calls based on subcategories
-or 
-*
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-
-
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+or title/abstract containing specific terms.
 
 
+## To-do list (documentation)
 On command line
 `python arxivscraper.py [-c|categories] [-f|from] [-u|until] [-w|waitingtime]`