current_game is now created dynamically at the start of game, and deleted
afterwards.

Solves #108
Merge branch 'master' into load_new_game

Conflicts:
	game/src/gameMenuScreen.py
User saves are now stored in saves/user_saves, which is ignored by
.igignore

Fixes #119
Merge branch 'master' into ignore_saves

Conflicts:
	game/src/gameScreen.py
Merge branch 'master' into boss_bugfixes