IRENE WANJIRU THEY say 'laughter is the best medicine but if you laugh for no reason, then you need medicine!' Comedians in Africa have tickled millions with their jokes, building a niche for themselves, with some becoming overnight celebrity millionaires. Among them are a growing number of rib-cracking women... The face of comedy is changing in Africa. Populations in a majority of African countries are proud of their national comedians, whether they are on TV, radio or online. ore and more people are earning a living from it. Satirical puppet and cartoon shows have broken new ground and significantly, more…