Metals reimplemented with JSON and Timeslots.

Rather than parsing the HTML of PDX's homepage, the app now pulls data
from the Padherder events API. MetalSchedule is now a singleton master
schedule for metals dungeons, and dungeons are represented by Timeslot
objects, containing a start time, a dungeon name, a country ID, and a
group ID.
Create README.md
Metals' times now display in local time.

That is to say, whatever timezone the phone is set to.