v0.4 - Theming

• Themed app to closely match Agonia
• Made scrollbars wider
• Added coords around map
• Added grid lines and a toggle to turn them on/off
• Added Menu to upper right and added credits & change log window
• Changed default zoom to 24 and range from 1 to 96 (up to 4x size)
• Expanded map to full 400x400
• Some backend cleanup & optimization