Metacat

use new "v1" types from DataONE

allow the test to read the OFL docid

use docImpl getBytes() to preserve encoding
no need to catch an exception only to throw it (those I was playing around with looking up the fmt from the d1_common lib if it was not found on the server...but this is redundant with other client code)

implement object format methods - using a separate class to do the actual metacat lookup/caching so that teh CN implementation looks cleaner