Make install guide copy-pastable

README.md

@@ -55,7 +55,7 @@ and `libjpeg-dev` packages.
 You need a recent *pip* for the installation of dependencies to work. If you
 don't meet that requirement (Ubuntu trusty does not), run:
 
-    pip install pip>=1.5.6
+    pip install "pip>=1.5.6"
 
 In any case, you then need to install coin python dependencies: