As already mentioned, a completely new Steal is in the making and in order to clean our repository up and move to real semantic versioning we migrated the old StealJS history to https://github.com/bitovi/legacy-steal.
If you are using Steal with the current JavaScriptMVC and cloned the GitHub repository, make sure to either change your remote or use the jmvc branch in the actual Steal repository (https://github.com/bitovi/steal/tree/jmvc).
The actual Steal master branch (https://github.com/bitovi/steal) now points to the new Steal version (also see the announcement).