Alpha0.5.5

Title: Fixes and more fixes

AI

 * More difficulty distribution to mechanics (more feelable differce between levels)

Fixes

 * AI player turn stuck
 * Magic towers vs Magic circles

Mechanics

 * Hidden visual and audio for AI player turn


 * Magic circle exclusion zone
 * Added debug console option to activate via console (game only)

Visuals

 * River sprite
 * Faction colors in main menu
 * Faction summoning effects
 * Main menu visual changes and setup
 * Intro enhanced