Corrected UV mapping. Made walls and door thinner. Added solar panel on top of the roof.
Corrected UV map. Made door thinner.
Added solar panel.
Added conditional output of 'content' part of the volume.
Added solar panel to SmallHangar, corrected volumes and areas after remodelling.
Added passive antenna to RoverLander.
Added SimpleDialog class to display dialog-type messages with Yes-No buttons.
Changed Utils class to internal.
Added SolarPanelUpdater.
Moved CheckRect form AddonWindowBase to Utils. Removed state display from Hangar.
Added confirmation dialog on deflation, if there's no compressed gas, compressor or atmosphere. Closed #68.

Also moved sound playing code to SlowUpdate coroutine.