Merge tag '1.4.0' into develop

1.4.0
Run against latest version of isort
Change BUILTIN_VARS to FROSTED_BUILTINS ; add __import__ to FROSTED_BUILTINS; addresses https://github.com/timothycrosley/frosted/issues/45
Merge pull request #47 from mattcaldwell/develop

Change BUILTIN_VARS to FROSTED_BUILTINS ; add __import__ to FROSTED_BUIL...
Add initial test code for noqa feature
Initial work toward skipping noqa
Don't add message if it's in ignore list
Don't use self with funtion based approach
Make sure not_ overrides work at python API level
Fix regex to work only with noqa, and frosted specific qa
Update test
Fix StringIO import
Add Randy Syring @rsyring to authors list as his work was the source of noqa support
Cast code before testing for noqa lines
Merge pull request #51 from timothycrosley/feature/ignore-single-lines

Feature/ignore single lines
Add support for stacked settings, where not_[setting_name] explicitly undoes settings
Add dont ignore command line argument
Sort imports
Merge pull request #52 from timothycrosley/feature/improved-settings-handling

Feature/improved settings handling
Bump version to 1.4.1