Add custom background position
 Changes to be committed:
	modified:   _layouts/post.html
	modified:   _posts/2013-11-19-making-applications-icon-smaller-on-gnome-shells-top-panel.md

 Changes not staged for commit:
	deleted:    media/2013-11-19-making-applications-icon-smaller-on-gnome-shells-top-panel/Mesh5.png
	deleted:    media/2013-11-19-making-applications-icon-smaller-on-gnome-shells-top-panel/morning.jpg
	deleted:    media/2014/b_bang_splash.mp4
	deleted:    media/2014/b_bang_splash.ogg
	deleted:    media/2014/b_bang_splash.webm
	deleted:    media/2014/bg.png
	deleted:    media/images/Captura_de_tela_de_2013_11_19_13_12_42.png
	deleted:    media/images/morning.jpg