It is very difficult to try and place Oscar Castro-Neves in any one category, but the nice thing about it is you don't have to. Guitarist, composer, arranger, singer and producer, Castro-Neves fits in all places all at once. This is very readily on display on his new recording All One on Mack Avenue records. When I spoke to him recently, he said that at first he started out with a long list of songs to choose from and that he slowly made his way through the list and mana …