Merge pull request #45 from MarekAG/patch-1

Added requirements and update command

README.md

@@ -70,6 +70,12 @@ REPL-y 0.3.1
 ...
 ```
 
+## Requirements
+
+- pip
+- python
+- python-dev
+
 ## Installation
 
 Install `The Fuck` with `pip`:
@@ -102,6 +108,13 @@ end
 
 Changes will available only in a new shell session.
 
+
+## Update
+
+```bash
+sudo pip install thefuck --upgrade
+```
+
 ## How it works
 
 The Fuck tries to match rule for the previous command, create new command