Cleanup of the Chris' TB scripts. Cosmetic in principle, but reworked
to use the DB library access routines, which also changed in response to what the tb scripts needed. Added some functions and mor constants. Removed the -nologfile option from all the scripts (startexp and endexp too), since there is no reason for these scripts to worry about log files. Thats handled in the wrappers. Tested with the testsuite and live in my own tree.
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