v0.3.0

This command has been rebranded to winter and is now an official product of the Winter CMS organisation. See more information here: wintercms/winter#5. Note that you will not be able to self-update an october PHAR to this new version, as the original repo no longer exists. However, self-updating should work from this point onwards.

• Added split command for maintainers to publish subsplits of Winter CMS modules.
• The project:version command now supports multiple branches of versions in Winter CMS.