AppDB: update the general help page and also make it valid html

[Alexander Nicolaysen Sørnes]

> I've updated the general help page with links to git instead of cvs,
> updated building instructions and also changed the html a little so it
> validates, I've also removed a link to a cracks website and replaced
> it with a statement about third party software.
>
> before and after: http://img222.imageshack.us/img222/8647/baiz4.png

It's great that you're fixing up the help pages.  But i don't see why you are 
removing the link to MegaGames; I added it to make it easier for users to 
test games without a how-to; removing it would appear to do the opposite.




Alexander N. Sørnes