Tweaked up startTrans and getMenu

• ADOdb_startTrans snippet includes an optional Execute, failTrans, and completeTrans useage.
• adodb_getMenu has execute statement to fetch the record set.

First minor update

Some changes were made to the variable names in the snippet for a more coherent experience.

The main database object was changed from $conn to $DB

Initial release

Initial release of ADOdb snippets