README: update badges and blog post

README.md

@@ -1,7 +1,16 @@
-# Using Trezor as a hardware SSH agent
+# Using TREZOR as a hardware SSH agent
 
 [![Build Status](https://travis-ci.org/romanz/trezor-agent.svg?branch=master)](https://travis-ci.org/romanz/trezor-agent)
 
+[![Python Versions](https://img.shields.io/pypi/pyversions/trezor_agent.svg)](https://pypi.python.org/pypi/trezor_agent/)
+[![License](https://img.shields.io/pypi/l/trezor_agent.svg)](https://pypi.python.org/pypi/trezor_agent/)
+[![Package Version](https://img.shields.io/pypi/v/trezor_agent.svg)](https://pypi.python.org/pypi/trezor_agent/)
+[![Development Status](https://img.shields.io/pypi/status/trezor_agent.svg)](https://pypi.python.org/pypi/trezor_agent/)
+[![Downloads](https://img.shields.io/pypi/dm/trezor_agent.svg)](https://pypi.python.org/pypi/trezor_agent/)
+
+See SatoshiLabs' blog post about this feature:
+https://medium.com/@satoshilabs/trezor-firmware-1-3-4-enables-ssh-login-86a622d7e609
+
 ## Screencast demo usage
 
 [![Demo](https://asciinema.org/a/22959.png)](https://asciinema.org/a/22959)