more file types to ignore
Hit the remote server immediately after an update
search by simplified podcast title

- strip away some common episode title elements (for Overcast support)
- use simplified episode title
- Break out podcast title for some Slate Plus podcasts.
- Add a column to track simplified titles.
- switch from date/time to date for nature, science podcasts
First working Overcast support

- still doesn’t handle episode deletion right (something is
incrementing play counts inappropriately)
- need to fix last update handling - it’s causing havoc for tracking
changes from Overcast.