Brain Juice V0.1 Update

Refinements and bug fixes this time:

• Updated the games title to actually be "Brain Juice" on the main menu.
• Experimented with 1bit dragon and added some menu music.
• Fixed NPC's getting stuck on walls we navigating around corners.
• Optimized gridmap geometry to reduce Z fighting (less flickering while moving around).
• Cleaned up NPC animations (no longer limping while walking, idle animation will be played by default.)
• Added artwork as background on the main menu.
• Added a Minecraft inspired subtitle - this picks a random string from an array I can add to easily in future.