Update breakpoints to match current standards

Add some spacing to mobile wide grid

Remove wrong max-width of spans

Fix issue with PRE tags wider than viewport

Completely revamped (breaking changes) from previous versions. CSS Gr…

…id module and options for flexible layouts.

Added a basic flexible grid based on percentages, and corrected a cou…

…ple of details. Also removed outdated build system in favor of external solutions.

Fixed issue with grid, added max-width for medium and small grids and…

… added hide/show classes for all breakpoints.

Samples file updated.

Small commit to add error handling on the gulpfile

Remove sample styles from compiled css

Introduce boolean variable to control output of grid