New version of sar plugin

Hi,

I've moved the SarTask in the sar plugin itself (snapshot version 
uploaded to dist.codehaus.org).

The major change is that in the dependency list of a project
(eg in the demos) is now the jar dependency and not the plugin -
this in order for it be in the classpath when the taskdef comes about.

To use the new plugin, you need to download it manually (only once)

maven -DgroupId=loom -DartifactId=maven-sar-plugin 
-Dversion=20031028.090136 plugin:download

Don't know if there is a way of automatically downloading the plugin
while keeping the jar in the dependency list.

Cheers