v0.3.0

Updates for release of v0.3.0

### Changes
* Added default [Neat settings](http://neat.bourbon.io/docs/#variables) to the `_settings.scss` file
* Added viewport meta info
* Removed `pxtoem()` function in favor of Bourbon `em()` [function](http://bourbon.io/docs/#px-to-em)
* Removed `pxtoper()` function in favor of Sass `percentage()` [function](http://sass-lang.com/documentation/Sass/Script/Functions.html#percentage-instance_method)
* Removed inuit arrows in favor of Bourbon [triangles](http://bourbon.io/docs/#triangle)
* Removed inuit `truncate()` mixin in favor of Bourbon's `ellipsis()` [mixin](http://bourbon.io/docs/#ellipsis)
* Removed inuit box-sizing in favor of Neat's [box-sizing](http://neat.bourbon.io/docs/#border-box-sizing)
* Removed batch icon styles
* Removed default theme files (from /modules and /layout)
* Changed clearfix class to a silent placeholder
* Changed unstyled-list class to a silent placeholder
* Updated imagemin task to overwrite images rather than duplicate them


### Review

@germanny 
@ericrasch 
@jameswlane 

### Notes

**These changes are not backward compatible and will break existing projects.** Be sure to read the list of changes and understand what they do.
excited about this!