update navbar hover color
add "grunt server" comment to  README file
add images to alerts
update form images path
update jericho.css
Merge remote-tracking branch 'marexandre/v2_branch' into gh-pages

* marexandre/v2_branch:
  update jericho.css
  update form images path
  add images to alerts
  add "grunt server" comment to  README file
  update navbar hover color

Conflicts:
	README.md
	jericho.css
	lib/_alerts.scss
	lib/_forms.scss
	lib/_navbar.scss
	lib/_variables.scss