It doesn't take a Ph.D to interpret the deeper meanings of this mural recently created by SFAI studentsA last-minute announcement went out this morning that students at the San Francisco Art Institute are mad as hell -- and they're not going to take it anymore. Spurred by the February announcement that nine tenured faculty members -- one quarter of the school's total -- were to be laid off due to a state of "financial exigency" -- and following a month of letter-writing, online petitions, and pr