Competition Doom v3.0.0 alpha1

Competition Doom 3.0 is based on Chocolate Doom 3.1.
See Chocolate Doom history for changes:
https://github.com/chocolate-doom/chocolate-doom

Imported most of v2 Competition features into v3:

• naming, icons & settings
• in game & end screen timer, novert always on
  IN PROGRESS/TODO:
• recording episode
• demo metadata
• competition setup menu