Fix deck exporting to HS

A possible fix for users encountering errors exporting decks to HS using language/kb layout other than English/US.

Ref: Issue #83
Merge pull request #85 from michaelb7k/Deck_Export_Fix

Fix deck exporting to HS
images for naxx cards (player and bosses)
db files for naxx,

fixed image names,
added new secrets to overlay
v0.3.16
option to highlight cards discarded from opponents deck (#77)
fixed cards being set as WasDiscarded when loaded from database (for whatever reason)
Added an option to clear the "New Deck" section again (#87)
Increased the max log length being read. Tracker wouldn't work if (re)started late in a game.
v0.3.17
Should fix issues with cards not updating (probably not the best way)