Changes:

 0.1
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* shadow now fits the one from xearth (elliptical orbit taken into account)
* maps now specifyable on commandline (like with xglobe)
* marker file specifyable on commandline (like with xglobe)
* some other commandline options
* support for jpg maps and maps with arbitrary width and height

 0.2
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* colors specifyable by command line
* time now specifyable by command line
* time-animation on/off by command line and keyboard
* 2 grid types switchable by command line and keyboard
* --help command line argument implemented
* maps selectable from menu (middle button)
* map path specifyable by commandline
* many other menu options
* removed several compile warnings