OS X native app

I demoed jetzt to @janl today and he suggested that an OS X native app would be good. The general idea would be an app that could speed-read any text in any app on OS X. This would be useful for people using desktop clients, like Mail.app.

One possible possible approach would be to hook into the accessibility framework.

I appreciate that this is probably a way out, but creating this issue anyway.

No files, tests, or entry points are named. Start by defining how an OS X native app would use the accessibility framework and what scope is intended; the stated goal is speed-reading text from any OS X app, including desktop clients such as Mail.app.

Written by the indexing model from the issue text.