Photo by katmere. After Carla Cohen, co-owner and founder of quintessential Washington bookstore Politics & Prose, died last month, the DC literary community lost an icon. To celebrate her life and her contribution to DC’s cultural scene, Politics & Prose will hold a memorial for Cohen tomorrow at 1 pm. There will be a number of speeches, giving tribute to Cohen, from icons in the DC writing scene. Speakers will include co-owner and co-founder…