Added rewriting the ${revision} for dependencies and removing the par…

[Tijs-2]

Hi Jean-Christophe,

I have found your library and used it to push a multi module project into my repository but it I missed two functions.

• Removing the relative part of the parent pom
• Rewriting the dependency $revision to the actual version. Which I both needed to use the pom for another project as a parent pom

Not sure if this is wanted but I needed itanyway and it seems to work, so I thought maybe it is a good addition.

Tijs