Update README.md

README.md

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-# pywayback
-A python wrapper for Internet Archive's Wayback Machine
+# waybackpy
+The waybackpy is python wrapper for [Internet Archive](https://en.wikipedia.org/wiki/Internet_Archive)
+'s [Wayback Machine](https://en.wikipedia.org/wiki/Wayback_Machine).
+
+## Usage
+
+### Capturing/Saving a url/website. Using save() function.
+
+waybackpy.save(url, UA=user_agent)
+
+```python
+import waybackpy
+# Capturing a new archive on wayback machine.
+# Default user-agent (UA) is "waybackpy python package", if not specified in the call.
+archived_url = waybackpy.save("https://github.com/akamhy/waybackpy", UA = "Any-User-Agent")
+print(archived_url)
+```
+```
+https://web.archive.org/web/20200504141153/https://github.com/akamhy/waybackpy
+```