clean up README

README.md

@@ -1,10 +1,22 @@
 # temp-index
 
-## hacking
+[![PyPI version](https://badge.fury.io/py/temp-index.svg)](https://badge.fury.io/py/temp-index)
+
+## install it
+
+```bash
+pip install temp-index
+```
+
+## use it
 
 ```python
 from temp_index import make_cards
 
 
-make_cards("mycards.pdf", "sqlite:///metadata.db", ["title", "uploaded_at", "comments", "authors", "tags"])
+make_cards(
+    "catalogue.pdf",
+    "sqlite:///metadata.db",
+    ["title", "uploaded_at", "comments", "authors", "tags"]
+)
 ```