Merge pull request #51 from sa2c/update

DOC: add a brief installation instruction

Author: vkhodygo

README.md

@@ -51,4 +51,11 @@ if [ $? -ge 2 ]; then
   ssh-agent -a "$SSH_AUTH_SOCK" >/dev/null
 fi
 export SSH_AGENT_PID=$(pgrep ssh-agent)
+```
+
+# Install
+We do not provide ready-to-install packages at the moment, 
+but you can use the following command to install the latest version of Rynner:
+```shell
+pip install git+https://github.com/sa2c/Rynner.git
 ```