3.0.0.alpha.5

• Add svg-grid plugin for generating svg background-images
• Add set-gutters $n shorthand syntax, so all basic grid settings can be customized on-the-fly
• Allow gutters function to take either context-only, or full span/context shorthand — useful when passing in details from a combined mixin
• More test coverage, including error-handling!

The core is complete, barring any bug discoveries. To do a beta release, we need one or two layout plugin examples. For a full release, we need better tutorial-style documentation.