Add another skyboxes.

...va/fr/amap/lidar/amapvox/visualization/Visualization.java

.../controllers/loadables/meshes/extended/AxisPrimitive.java

...ar/amapvox/visualization/controllers/voxels/Skyboxes.java

...lidar/amapvox/visualization/controllers/voxels/Space.java

.../amapvox/visualization/views/PropertiesInternalFrame.form

.../amapvox/visualization/views/PropertiesInternalFrame.java

...alization/src/main/resources/shaders/skybox/fragment.glsl

...lization/src/main/resources/textures/blizzardsky/back.png

...zation/src/main/resources/textures/blizzardsky/bottom.png

...ization/src/main/resources/textures/blizzardsky/front.png

...lization/src/main/resources/textures/blizzardsky/left.png

...ization/src/main/resources/textures/blizzardsky/right.png

...alization/src/main/resources/textures/blizzardsky/top.png

...alization/src/main/resources/textures/miramarsky/back.png

...ization/src/main/resources/textures/miramarsky/bottom.png

...lization/src/main/resources/textures/miramarsky/front.png

...alization/src/main/resources/textures/miramarsky/left.png

...lization/src/main/resources/textures/miramarsky/right.png

...ualization/src/main/resources/textures/miramarsky/top.png

...sualization/src/main/resources/textures/plainsky/back.png