[FA]{issue} I42 - Skin

Closes #42
-Added new font
-Moved skin pictures into a texture atlas and the styles into a JSON
[FA]{other} Logo, button images overhaul

-Recreated Logo
-Created new background images for buttons etc
-Replaced fixed font by fontgenerator generated font
[FA]{issue} I30 - Use Button

Closes #30
-added use button
-only visible, when the next tile the player is facing towards is
useable