"Most bands just take Gang of Four ideas and call them their own"
New album will be band's first release since 2011's 'Content'
Bands including Sky Larkin, Esper Scout, Love Buzzard and Cattle have contributed to the release
Andy Gill says Flea apologised for ripping them off
Acts join the likes of Carl Barat, Warpaint and Caribou for February gigs
Group will begin the jaunt in Toronto, Ontario on February 4
'Content' is due out on October 4
Post-punk band to appear live and in conversation in June