indented with monoDevelop

Signed-off-by: Nicolas Cailloux <caillouxnicolas@gmail.com>
XML maps are read (not computed yet)

Signed-off-by: Nicolas Cailloux <caillouxnicolas@gmail.com>
maps are successfully created

Signed-off-by: Nicolas Cailloux <caillouxnicolas@gmail.com>
added a dummy image for tileset

Signed-off-by: Nicolas Cailloux <caillouxnicolas@gmail.com>
missing tiles from tilesets are set to default

Signed-off-by: Nicolas Cailloux <caillouxnicolas@gmail.com>