gravit: 0.5.1-1~getdeb1

  * New upstream version
    * Used new skybox images with liberal licences so the project is now
    actually "free software" (Tomasz Buchert)
    * Many thanks for Frank Möhle for the rest of these changes!
    * Lua 5.2
    * Small updates for classic physics
    * OpenGL rendering tweaks
    * Glowing particle textures (#83)
    * Added MESA GL 7.x/8.0.x to blacklist
    * VMWare OpenGL driver to blacklist
    * Added more spawn scripts: merging galaxies, clouds, plummer
    * Fix setvideomode: second try with videoantialiasing=0 fails (#66)
    * Use spawn name as default simulation name (#49)
    * Smooth rotation and zoom (#89)
    * Many bugs fixed, speed improvements, and build fixes