1.3.1 Camera Damping Slider, Defeat Effects, Bug fixes

added a slider (0-0.05) instead of an on/off switch for "camera damping" and set the default value to 0.016
fixed a bug where the "explosion" effect would not lead to the game over screen if damage is continuous
corrected different fonts used in the options menu
updated defeat effects for some bosses
groundwork done for the Elite Only Mode