The "trunk" series represents the primary line of development rather than a stable release branch. This is sometimes also called MAIN or HEAD.
The 1.1 series improves on 1.0 by the addition of a second module. Rocket can now serve static files from the filesystem.
The 1.0 series marks api and application stability and is recommended for inclusion in your favorite web framework.
The legacy trunk maintains a recent version of Rocket for Python 2.4 compatibility. It is only available in monolithic form.