0.5.0

• -Fixed the exception with LwjglWindow on Windows;
• -Implemented the camera like camera of Blender.
• -Fixed the text input.
• -Implemented the hotkey 'delete' to delete files in tree.
• -Implemented the manipulators in Model Editor.
• -Updated the action for generating tangents.
• -Changed rotation property of model to Euler in Model Editor.