To get started with the Sedona Framework the simplest thing is to download the latest build and walk through the tutorial. The more adventurous can work right off the Mercurial tip and build from source.
The Sedona Framework source code is managed in a public Mercurial repository:
Mercurial is a distributed revision control system, also known as hg. Mercurial makes it flexible for you to maintain your own branches of development, yet still integrate with the main repository. If you are not familiar with Mercurial you might try these links: