TODO:
+ stations signs + labels
+ label entrances and fixed stations
+ multiple color modes
+ measure toolbox
+ survey tree
+ animation toolbox
+ multiple surfaces support
+ finish SK translation
+ fix Mac OS X built
+ search for help and localization files under Linux
+ scalebar to OpenGL list
+ channel brightness adjustment in stereo mode
+ station labeling
+ PNG texture support
+ color schemes (altitude, surveys, date)
+ add closed file mode
+ File->Close
+ escape in full-screen mode from toolboxes

BUGS:
+ inactive loading file window
+ radiobutton not active when rotation

MAC OS X:
 a) Udelat z ni bundlovanou aplikaci
 b) Dodat Info.plist, do kteryho se napisi typy souboru, 
    ktery to ma zrat pretazenim, jaky maji mit obrazek
    (asi mysli ikonu), koncovku, file type, atd.
 c) Doprogramovat podporu pro tohle aby pri pretazeni 
    se event zkonvertoval na udalost pro otevreni souboru 
    aniz by te to otravovalo s oknem pro jeho vyber.
