Add note to help new users install

[brianpeiris]

pip's installation guide can be a bit confusing for new Python users. As demonstrated in this reddit post, the installation guide seems to suggest that you should use virtualenv to install pip. The virtualenv installation guide says you should use pip to install virtualenv. While the relationship between the two might be obvious to experienced users, new users would easily get caught in this self-referential loop.

Adding this note might help new users get started with pip.

[qwcode]

thanks @brianpeiris . we share your concerns, and are already discussing this in #1079 at the moment. I think edits will come out of that, that will satisfy your concerns.

[brianpeiris]

@qwcode Thanks for the reply. It seems #1079 will take a while to resolve itself and is a larger superset of this issue. Isn't it better to apply a small fix now and allow the bigger/better fix to come later? ("Perfect is the enemy of good", etc.)

[qwcode]

working on something now for #1079. so hopefully not too long