Release 2.18.0

18 new icons:

• brand-ansible
• brand-cinema-4d
• brand-craft
• brand-digg
• brand-electronic-arts
• brand-feedly
• brand-filezilla
• brand-speedtest
• brand-vlc
• brand-wikipedia
• brand-xamarin
• hdr
• ironing
• layout-grid-remove
• logout-2
• wash-dry-flat
• wash-eco
• wash-hand

Fixed icons: logout, play-volleyball