Fixed typos, thanks Yuri!

	modified:   app/views/builds/import.html.haml
	modified:   app/views/static_pages/about.html.haml
	modified:   app/views/static_pages/contribute.html.haml
	modified:   app/views/stats/timeline.html.haml
	modified:   locale/app.pot
	modified:   locale/es/app.po