Merge tag '1.3.3' into develop

1.3.3
:%s/become stagnate/become stagnant/g
Merge pull request #41 from graingert/patch-1

:%s/become stagnate/become stagnant/g
Fix issue #42: incorrect help text
Merge pull request #43 from timothycrosley/feature/fix-issue-42

Fix issue #42: incorrect help text
Add a test to ensure expected behaviour
Add necessary setting
Finish support for defaulting doctest running to off, and making it fully configurable in an intuitive way
Add small reference to doctests setting being available in settings in readme
Merge in latest changes from development
Merge pull request #44 from timothycrosley/feature/doctest-off-by-default

Feature/doctest off by default
Add support for more intuitivly setting values to False
Bump version to 1.4.0
Merge branch 'release/1.4.0'