** General **
- added object type for line: Box
- added clear settings command to settings menu
- automatically save settings near project file when exporting is done, and
restore the settings next time
- added GSIElevTilePlugin (DEM provider. Optional feature)
** DEM **
- texture rendering with multiple selected layers
- added option to clip DEM with polygon layer
- added option to increase resolution of texture
** Web page **
- added "save image" dialog in which image size can be entered
- fixed bug of restoring view from URL parameters
** Others **
- added lower Z option (Profile)
- added texture option, side option and side lower Z option (Overlay)
- takes map rotation into account (Disk, JSON, COLLADA)
