Fix pod file processing in pom.xml

Fixes #5 (and replaces #7)

This is based on what was implemented in `ncm-cdispd` to fix the problem and is probably a more comprehensive solution for the issue (one aspect of the issue is that in `target/doc/poc` there is a .pod added at each run because of the way `Rename` is driven).

If merging, this PR, #7 should be closed without merging.