4.0.0

• 9d6c099 Integrate the node-sass-filter-importer according to #80
• 0bd80f9 Update node-sass-selector-importer to fix a problem with resolving paths when importing via CLI.
• 821669f Add a test for the cli implementation, fixes #82
• 5944144 Use babel instead of buble and prepare for using babel to test es6 files directly.
• 620e05f Update npm dependencies. Fix compatibility issues with new versions of dependencies. Fix linting errors because of a new version of the modularis linting config.
• 95c548a Change the file name of the magic importer class and move the dist file in a lib subdirectory.
• 2b6462e Split tests into multiple files and simplify the tests. Use babel to test es6 source files directly.
• 52c09dc Simplify the CLI script.
• 6966f4c Use the cleanImportUrl package from the filter importer package to get a clean resolvedUrl.
• d7a772a Simplify the import once mechanism. Do not try to be smart about selector filters. URLs with filters are always imported, but there is a warning if the same file is imported multiple times.
• 38c435b Optimize the main index file. Add default options as separate module. Fix a problem with resolving absolute paths.
• 033fe16 Update the filter importer module.
• 3a8fe24 Remove old dist files. Delete dist directory before rebuilding. Add default options dist file.

Minor changes

• c9c0346 Add .gitattributes file and add a setting to treat files in the dist directory as binary files.
• ce620f4 Add gulp usage example to the README, fixes #77
• 298521e Change gitattributes to also treat files in subdirectories of dist as binary files.
• 90656a9 Update npmignore file with newly added files.
• c5c2e68 Reformat doc block comments.
• 875b5cb Add infos about node filtering to the README.
• 567e42b Update the general description to mention node importing.
• f768876 Remove old upgrade instructions and add new instructions.
• 3861c74 Update dependencies.