[arch-projects] Patch for version strings

[Loui]

> How about we make a one time change to config.inc to include
> version.inc at the top.
> Then have a new file (version.inc) with nothing more than a define for
> the version variable.
>
> aur.inc is messy enough. I would hate to start getting more random
> defines in there.
>

I'm thinking it should be version.php or something but I still don't
think it should be in the config file. Maybe it could be in aur.inc.
About aur.inc being messy, why not then clean it up? I have one commit
that takes a step towards that goal.

2e27c1f695c42408efb6a77d464331ab9440e604