An impromptu patch release to fix the version numbers in our JavaScript files, restore some missing grid classes, and general improvements to our documentation.

• #10039: Remove window.jQuery for jQuery.
• #11273: Add branch alias for composer.json.
• #11295: Restore offset, push, and pull zero classes (e.g., 1.col-md-offset-0`)
• #11315: Add navigation role to example navbars.
• #11327: Improve nesting of .thumbnail styles.
• #11334: Remove unnecessary & from CSS nesting for panels.
• #11335: Add Grunt task to update version numbers across entire project. (Note: If you run our docs locally, you'll need to run npm install in order to run grunt).
• #11336: Don't use nonstandard window.location.origin in Customizer.
• #11345: Remove duplicate class changes in migration instructions.
• #11349: Add screen reader text for navbar toggles.
• #11378: Use .navbar-* alignment classes in .navbar-text example.
• Update Node to v0.10.x (current stable)
• Fix links to same-page anchors
• Drop media type on basic template example
• Correct download links in readme

For a full list of issues and pull requests in this release, see the v3.0.2 milestone.