Update instructions added

README.md

@@ -2,6 +2,8 @@
 
 Installation instruction for cutelog
 
+# Install
+
 ## Create Virtualenv
 virtualenv venv
 
@@ -12,3 +14,9 @@ deactivate
 
 # Open Cutelog
 venv/bin/cutelog
+
+
+# Upgrade
+source venv/bin/activate
+pip install -U -r requirements.txt
+deactivate