generateDependencies goal is ignoring exclusions

[Laonel]

generateDependencies goal is creating a list of dependencies based on the content of the manifest file, but it is not using the exclusions specified for the artifacts. This can cause some issues if a project is declaring its dependencies explicitly in the POM because it needed to do some exclusions - as the POM file is overwritten with the one generate by the generateDependencies goal that contains no exclusions.

Also, README doesn't make it clear that generateDependencies is replacing the original POM and why it is doing so (maybe it should be configurable?).