[arch-general] commitpkg script than handle better splitted package

[Laurent Carlier]

http://pkgbuild.com/~lcarlier/communitypkg

Currently all commands that send something to the repos are commented.

- two seperate paths : monolithic or splitted package
- script take care when arch, pkgver, pkgrel are redefined in package() 
functions
- archrelease is only called for archs who need update

I guess ther can be some mistaes done but i'm not really a bash expert, but of 
course comments are really welcome.

Regards