fix autocommit and arraydml to work in the same oraexec
add additional arraydml tests
implement -tw (theme) as a parameter to logonBox.
this should have been part of previous commit
add tests and improve error handling.
update README
Upgrade to TEA 3.6
correct null byte offset in ColAppend
new Oratcl::utils package added to CVS
BUG [17087729] read BLOB gives ORA-21560
