1.0.5 - Minor fixes and player sprinting modes

This patch makes some minor adjustments: [list] [*] The underground music within the upper layer should now loop a lot better. [*] Introduction of a slower walking speed as the default walking speed. The player will be able to swap between sprint and slower walking speeds, by pressing the configurable sprint key (configurable in settings) [*] Fixed key configuration not saving. [*] Fixed full-screen map mode drawing vertical lines only at specific window sizes. [*] Multiplayer timeout would infinitely hang. This should now be fixed. [/list]