=head2 send_cmd($command)

Sends any arbitrary command to the LCD. (I've never tested this!).

Parameters:

    $command

Mandatory: A command to submit to the LCD.

=head2 position($x, $y)

Moves the cursor to the specified position on the LCD display.

Parameters:

    $x

Mandatory: Column position. C<0> is the left-most edge.

    $y

Mandatory: Row position. C<0> is the top row.