Update usingdocker.md

boot2docker on windows also uses an IP of its own.

Docker-DCO-1.1-Signed-off-by: Tom Maaswinkel <tom.maaswinkel@12wiki.eu> (github: SvenDowideit)

docs/sources/userguide/usingdocker.md

@@ -179,7 +179,7 @@ see the application.
 Our Python application is live!
 
 > **Note:**
-> If you have used boot2docker on OSX you'll need to get the IP of the virtual
+> If you have used boot2docker on OSX, or Windows, you'll need to get the IP of the virtual
 > host instead of using localhost. You can do this by running the following in
 > the boot2docker shell.
 >