Tcl_AppendObjToObj() is in Tcl8.3 so #defines removed
tcl_obj result handling
cleanup tests/oralob.test
cleanup tests/oraparse.test
Oratcl_Bind() error handling and Oratcl_Checkerr() Tcl_Obj handling
reformat existing comments
update orabindexec.test
improve test tests/oraplexec.test
Oratcl_Exec, Oratcl_Logon, Oratcl_Open changes
