Verify against double-FFTw, benchmark against float-FFTw
Verify against double-FFTw, benchmark against float-FFTw

ddemidov/vexcl,ddemidov/vexcl,Poulpy21/vexcl,Poulpy21/vexcl,kapadia/vexcl,kapadia/vexcl,Poulpy21/vexcl