Add a sorted wordcount to the bottom of all_pod_files_spelling_ok

This makes nuking the most commonly misspelt words easier if you're
working on a large project with a lot of files, by helping you easily
see what needs to be deemed a "stopword" and what needs to be hit with
an edit pass.
Merge pull request #7 from kentfredric/master

Add a sorted wordcount to the bottom of all_pod_files_spelling_ok