Tickets are now on sale for Big Kansas City, the annual entrepreneurship conference for founders, designers, developers and investors. This year’s program will feature the co-CEO of eyewear startup Warby Parker. Big Kansas City will kick off with a public party at 8 p.m. Oct. 8 at Missouri Bank, 1044 Main. Tickets are required to attend the formal conference on Oct. 9 and 10 at Hangar 9 at Charles B….