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...
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