FRIDAY: >> There are few names in modern dance as big as Merce Cunningham. The veteran dancer and choreograhper brings his company to the Kennedy Center tonight and Sat. to perform a few of their paradigmatic pieces, including Fabrications, featuring music by Emanuel Dimas de Melo Pimenta, and Sounddance, with music by David Tudor. These shows are a sure thing. $21 to $50, both shows at 8 p.m. >> Serious ambient and electronic music fans…