docs: add notes about IIS, Windows Authentication and Mercurial (The original patch from Konstantin has been heavily copyedited and modified by Mads Kiilerich but is still [based on] Konstantin's feedback and contribution.)

[tox]
minversion = 1.8
envlist = py{26,27}-{pytest,nose}

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    nose: nose
    pytest: pytest
commands =
    nose: nosetests {posargs}
    pytest: py.test {posargs}