rename bash script to `trezor_agent`

README.rst

@@ -3,10 +3,10 @@ Using Trezor as a hardware SSH agent
 
 Sample usage::
 
-	~/Code/trezor/trezor-agent $ ./agent -k home
+	~/Code/trezor/trezor-agent $ ./trezor_agent -k home
 	ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBKJnIA4lKZ1hR2tNUOFmtc8MwAVR4oe0CP5QzSrviSi4joZSTzHcmazK0800w2aj132EEmf1kzl6Vf7h46iCeD8= home
-	~/Code/trezor/trezor-agent $ ./agent -k home > ~/.ssh/authorized_keys
-	~/Code/trezor/trezor-agent $ ./agent -k home ssh localhost
+	~/Code/trezor/trezor-agent $ ./trezor_agent -k home > ~/.ssh/authorized_keys
+	~/Code/trezor/trezor-agent $ ./trezor_agent -k home ssh localhost
 	Linux lmde 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-3~deb8u1 (2015-04-24) x86_64
 
 	The programs included with the Debian GNU/Linux system are free software;