Daniel Luna

Add reader_opts (currently only useful for password-protected files) to PDF::Reader.open call

1

I had to use this gem to analyze some password-protected documents and it required these small changes. The corresponding code in [pdf-reader](https://github.com/yob/pdf-reader) is [here](https://github.com/yob/pdf-reader/blob/8548ce483f79dc215d7648b85cc42dfd01b52302/lib/pdf/reader.rb#L113) and [here](https://github.com/yob/pdf-reader/blob/26ea423c42f673d4579bcd3c1cf63523e8ddc079/lib/pdf/reader/object_hash.rb#L42). Would you mind adding...

Following the service/operation object pattern (for instance, see http://trailblazer.to/gems/operation/2.0/), we should be able to send e-mail invites decoupled from a particular controller action. This also allows one to use a...