scikit-bio: First beta release at SciPy 2015!

We're extremely excited to announce the first beta release of scikit-bio, version 0.4.0, from SciPy 2015 in Austin, TX! This is a major release in which the following subpackages have been mostly or entirely rewritten: skbio.sequence skbio.io <strong>These APIs have changed (and improved!) since 0.2.3, and are now considered stable.</strong> All other APIs are now considered experimental, and will be stabilizing in our upcoming releases. Beginning with this release, all aspects of our public API are annotated to indicate their stability so our users are aware of what APIs can be relied on, and which might change. <strong>The new API stability docs contain more details, including what we mean by <em>stable</em> and <em>experimental</em> in this context.</strong> We now have a dedicated scikit-bio twitter account, which will be the primary way that we share news about scikit-bio. <strong>You should follow @scikitbio on twitter for project updates.</strong> We're also excited to have had some new contributors in this development cycle. Check out our contributors page to see who's involved (and get in touch if you want to get involved - we're interested in working with developers of all skill levels!). You can review our CHANGELOG.md for a more detailed description of the changes since 0.2.3. To learn about what you can do with scikit-bio, you can browse our (awesome!) documentation or learn some new bioinformatics recipes with the scikit-bio cookbook. Thanks for your interest in scikit-bio!