Container's max-width properly

.container max-width was defined in each media query size.

Media	Max	Width
xs	460px	90%
sm	576px	90%
md	1200px	90%
lg	1366px	85%
xl	1600px	75%

1.0.19: No need to import util/functions when import util/media in sass mode.

 Changes to be committed:
	modified:   README.md
	modified:   changelog.md
	modified:   dist/gosp.css
	modified:   dist/gosp.css.map
	modified:   dist/gosp.min.css.map
	modified:   package.json
	modified:   src/util/_config.scss
	modified:   src/util/_media.scss

Gosp 1.0.0

Minified file was saved as style.min.css

 Changes to be committed:
	renamed:    dist/style.min.css -> dist/gosp.min.css
	renamed:    dist/style.min.css.map -> dist/gosp.min.css.map
	modified:   gulpfile.js