fix bug: prev and next buttons in slider was not functioning properly
fix boxes in the main slider
Merge branch 'master' of github.com:mahsa-poorjafari/shad_toos

Conflicts:
	app/assets/stylesheets/application.css
	app/views/sliders/_slider.html.haml
Merge branch 'master' of github.com:mahsa-poorjafari/shad_toos