added brega as playable

Change Notes

- Fixed the faction selection UI to display the full list of factions per culture
- Fixed the UI bug in game at the top of the screen for all cultures - i still need to tie up some game mechanics for some of the cultures

Known Issues
- I just saw i missed the Brega faction!! i will add it soon

welsh ui culture & heroism gameplay fixed

English factions UI should now be fixed & the game mechanics restored. working on the other cultures next & the victory conditions

all factions should now have custom traits - let me know if any seem over/under tuned