v0.3.0 release

v0.3.0 release.

Features:

• Fullscreen option.
• Screen resolution option.
• Music fade in.
  
• More audio feedback in the UI.
• Improved font color.
  
• Improved pause menu. Avoids pausing between transitions and automatically pauses if the game window loses focus.

Bug fixes:

• Fixed ending music.
• Fixed minor poster rendering bug.
• Fixed enemy chasing feedback triggering in the main menu.
• Reduced clown laugh audio panning.