IssueID #1487: added basic readme

README

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+Pipeline for assigning (first creating, if necessary) superbaza
+structure_ids to a file of arbitrary Slovene strings, line by line.
+
+Example usage:
+
+$ cd scripts
+$ ./setup.sh
+$ echo "velika miza" > ../tmp/strings.txt
+$ echo "kdo ne more mimo česa" >> ../tmp/strings.txt
+$ echo "pazi, avto!" >> ../tmp/strings.txt
+$ source ../venv/bin/activate
+$ python pipeline.py ../tmp/strings.txt ../tmp/output.xml