On May 3 and 4, Music Director Rossen Milanov concludes the 2013-14 seasons for both Symphony in C and Princeton Symphony Orchestra. May 3 sees the Bulgarian conductor in Camden, NJ for Symphony in C where he conducts Schumann’s Manfred Overture, Mendelssohn’s Violin Concerto featuring soloist Augustin Hadelich, and Schoenberg’s orchestration of Brahms’s Piano Quartet No. 1. The following day, …