Minor Description
When the www.iblibo.org/maven repository is down (as it seems right now, at least from here), or when you want to work form an unconnected place (yes, it still exists...), build fails because ant wants to check every jar timestamp.
The attached patch modifies this behaviour: if a jar file is already present, the repository is not hit at all (why would we have to check any timestamp anyway since version numbers are present inside filenames?!).
The new force.jar.loading property forces reloading of jar files.