Remove ABSTRACT comment from MaxMind::DB::Reader::PP

This just ends up causing dzil to generate mostly empty docs that aren't
really useful to anyone.
Don't let Authority plugin munge code
Add some more test plugins to our dzil plugin list
Add docs for MaxMind::DB::Reader
Add one small word to the docs
Fixes typos.
Merge pull request #7 from maxmind/dave/docs

Added docs