Pacman 4.1 Changes

As I wrote on AUR:

Added some optdeps, since you added the option for download handlers
Added the pkgver function for the new versioning handling
I did not add python, as in my paste.
build got renamed to package and the git-stuff removed, as it is not necessary anymore
Merge pull request #9 from Narrat/patch-1

Pacman 4.1 Changes