align with BSD OSI template

[lsmith77]

This will ensure that GitHub is able to properly detect the license:

licensee detect .
License:        BSD-3-Clause
Matched files:  LICENSE
LICENSE:
  Content hash:  704dcf7ada45d2b35bf8f3d5d125820e654d0dc2
  Attribution:   Copyright (c) 2014, Saurabh Kumar (python-dotenv), 2013, Ted Tieken (django-dotenv-rw), 2013, Jacob Kaplan-Moss (django-dotenv)
  Confidence:    99.58%
  Matcher:       Licensee::Matchers::Dice
  License:       BSD-3-Clause
  Closest non-matching licenses:
    BSD-3-Clause similarity:        99.58%
    BSD-4-Clause similarity:        85.51%
    BSD-3-Clause-Clear similarity:  84.40%

[bbc2]

Looks OK to me. @theskumar What do you think?

[theskumar]

It works with me! :)