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

-Xss512k was needed for me on both my work computer (Windows 8, 64-bit) and on my computer at home (Windows 7, 64-bit, java 1.7.0_67). But it does look like the change could reintroduce a bug, so it's a good idea to look into this separately.