CatalogTraversal reports decompressed catalog size
add -s to lsrepo that prints catalog sizes
add -e to lsrepo that prints catalog entry counts
Merge pull request #436 from reneme/feature-clg_size_lsrepo

Feature: cvmfs_swissknife lsrepo Optionally Prints Catalog Size and Entry Count

This (partially) implements the feature request in CVM-611. cvmfs_swissknife lsrepo now accepts the switches -s and -e that print both the catalog file sizes (decompressed in bytes) and the contained directory entries.