Regular expression support in ignore option

* Extended the ignore option to support regular expressions
* ignore option doesn't differentiate between left, right and normal quotation marks in ignore strings and the messages, so that you can write normal quotation marks in your ignore strings (vnu uses left/right in messages).
* Changed the call to java to always send -Xss512k

Can you explain why you made this change? If you look at #28, there's some history behind this approach. This looks to me like you're going back to the old faulty approach. If you could revert this part, we can land the regexp matching independently.