fix a bug with add_content which was generating a new statement rather than adding to an old one, plus fix a bug with the load_statement function, and add to both ore and atom statements listings of derived resources as well as original deposits
fix a bug with add_content which was generating a new statement rather than adding to an old one, plus fix a bug with the load_statement function, and add to both ore and atom statements listings of derived resources as well as original deposits

git-svn-id: be288276da579bf930a6c6986c8ed5da68b822f6@389 2bf6ea0f-123d-0410-b71a-f1a21eb24612

fcrepo4-labs/sss,fcrepo4-archive/sss