small bugs

Hi,

I love your parser and am planning to use it in my reporting package.
However while testing I notices a few small things:

When doing:

select date_format(date, '%d-%m-%Y') from table xxx

the function is shown as 'format' and not as 'date_format'

Also I noticed you do not yet support

select amount/100 from table amounts

The division is not shown in the tree

Keep up the great work!!

Fix for function names with underscores:

In the preg_match in function _makeChildsTree change the pattern [A-Z] to [A-Z_]

Michiel