Add VNCPassword feature + Example

[bigrck64]

Hello Sharat

Veency had a nice feature you drop: the password authentification.
Finally it would be very simple to add it back, I suggest you to add a new preference to be able to change it on the phone, then use the Saurik code to match the password if not null :)

---

Demo with password in hard set to "screendump"

[cosmosgenius]

Added password in #8

[bigrck64]

Nice ! :-)