New pip version

Hello,

When i run bench update i can see following message:
You are using pip version 6.0.8, however version 6.1.1 is available.
You should consider upgrading via the ‘pip install --upgrade pip’ command.

i have ran pip install --upgrade pip and pip are successfully upgraded, but message won`t disappear.

It must be for the pip in bench virtualenv,
from the bench-dir, run

./env/bin/pip install --upgrade pip

thanks, with this command worked fine.