fulldisjunction - fd: Finished the code documentation and revamping the

Log Message:
-----------
Finished the code documentation and revamping the error messages and Asserts.

Modified Files:
--------------
fd:
algstructs.c (r1.23 -> r1.24)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algstructs.c.diff?r1=1.23&r2=1.24)
algstructs.h (r1.18 -> r1.19)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algstructs.h.diff?r1=1.18&r2=1.19)
algutils.c (r1.22 -> r1.23)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algutils.c.diff?r1=1.22&r2=1.23)
algutils.h (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/algutils.h.diff?r1=1.15&r2=1.16)
odmbfd.c (r1.22 -> r1.23)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/odmbfd.c.diff?r1=1.22&r2=1.23)
queues.c (r1.20 -> r1.21)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/queues.c.diff?r1=1.20&r2=1.21)
queues.h (r1.11 -> r1.12)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/queues.h.diff?r1=1.11&r2=1.12)
queuesfuncs.h (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/queuesfuncs.h.diff?r1=1.15&r2=1.16)
tset.c (r1.16 -> r1.17)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/tset.c.diff?r1=1.16&r2=1.17)
tset.h (r1.12 -> r1.13)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/tset.h.diff?r1=1.12&r2=1.13)
tsetfuncs.h (r1.13 -> r1.14)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/fulldisjunction/fd/tsetfuncs.h.diff?r1=1.13&r2=1.14)