XSB Src (SVN)-old

added refs to Java

Comments from hguo's commits to xmc:
Removes one bug caused by nil pointer
Remove two warnings

1. fix incorrect change to flora_FDB_filename
2. fix typo in flora_load_dyn

error message for invalid use of update operator

This change requires an update to XSB

1. Added commit for backtrackable updates,
so these updates work correctly with all-answer queries
(i.e., not undone due to a fail-loop that is used to obtain all answers).
2. Changed flora_FDB_filename so that the P file will
contain only a base name for the .fdb file.
Instead, flora_load_dyn will attach the directory at the loading time.
This makes .P files location-independent (hopefully)
3. Added while-do and do-until loops.
Require more work: Not yet what is needed, because they commit everything.

added current_loaded_file/1 to consult
made catch/throw standard in std_xsb

added commit for backtrackable updates

replaced error msgs with debug msgs

added USERMOD_PSC constant

small changes