Demo timeout increased to 1+ hour

I increased demo timeout to more than 1 hour, so now all demo users can enjoy at least 1 hours of play without buying a key (the time out is actually much higher).

I have decided that the buy link should be more or less a 'donate' link.

The main reason is health and family related. If the service is perceived to be paid, I am under pressure to perform, and recently there is a sudden surge in support emails etc, plus my family/work/WOW and other developments, I am stressed out.

I will keep working on maintain the current bot, but make it free so I could worry less when my job/family/life took priority (i.e. my upcoming vacation :-) )