Add support for node-webkit and firefox os

Work in progress.
Remove guess packetver system

It was outdated and can't really work so the 'auto' parameter of
packetver is removed (after being set as deprecated for multiple
months).
Add a new charBlockSize parameter to parse char-select packet  since it
does not depend of packetver at all.
Update file size
Fix skill window selector error
Add support for cutin with extention

The extention is in fact optional
Fix UI possible bugs

- Reference bugs of callbacks in Escape menu
- Do not drag on menu of WinList
Some changes to better support Aegis servers