Better integration of PHPMailer

Now, tmail/from would be used over tmail/phpmailer/from. Last would be used only if tmail/from contains no value. This way you can properly specify sender using default TMail functionality

e.g. $tmail->send($to, $from);

if $from is ommited, TMail grabs tmail/from from config. So, if you leave that empty, then tmail/phpmailer/from is used
MySQLs approximate value types are evil :)

Don't use MySQLs approximate value types like float or double anymore. Instead use decimal(15,4). If you need more precision or scale, then you can always extend this class.

References:
http://dev.mysql.com/doc/refman/5.5/en/problems-with-float.html
http://dev.mysql.com/doc/refman/5.5/en/precision-math-decimal-changes.html
AutoCreator: make money and real fields bigger
finetune