docs/setup_dev_env: make text & examples coherents for virtualenv.
docs/setup_dev_env: make text & examples coherents for virtualenv.

ImaginationForPeople/imaginationforpeople,ImaginationForPeople/imaginationforpeople,ImaginationForPeople/imaginationforpeople,ImaginationForPeople/imaginationforpeople,ImaginationForPeople/imaginationforpeople,ImaginationForPeople/imaginationforpeople