Added default flag to customizable grid vars
Bumped version to 2.0.3
Declared breakpoint vars (overridable) that are used within the media queries
Fixed breakpoints, added -bp-min-width
Added xs-bp-max-width breakpoint; Renamed media query vars based on size rather than format; Fixed tablet section to use small media query rather than medium
Max width of md mq only set if use-lg-breakpoint is true; Recompiled grid.css
Removed sass cache, added it to gitignore
Merge pull request #4 from crowdfavorite/feature/overridable-variables

Configuration variables are now overridable without modifying `grid.scss`, an additional size is now available, and some general fixes have been applied. Detailed changes are noted [here](http://j.mp/1l89TTe), [here](http://j.mp/VlmzS2) and [here](http://j.mp/VlmSMD).