GZDoom g4.5.0

• For all of Doom's fullscreen images there's now widescreen versions provided. The other games are still being worked on and will be added later when they become available. All new images were created by Nash - this does not use any of the versions from the Unity port.
• A simplified options menu is now available for quick setup of the important settings.
• New keybindings presets. Users can now choose between the classic layout and a WASD-based one
• Menu and intermission screen now scale to the original Doom.exe's layout by default.
• major additions to the menu system - animated menu transitions, image slideshows and fixed size menus can now be created.
• the console now uses the border flat as default background instead of the titlepic.
• it is now possible to fully quit the fullscreen console and get back to the title loop.
• various enhancements and fixes for ZScript.
• Interpolate positions and angles in the automap for smoother appearance
• Added $PitchSet for SNDINFO.
• allow indirections in the string table by prefixing the language string with '$$' the remaining text is interpreted as another string label to resolve.
• optimization of the patch texture checker - do not read in the entire file if checking the initial header is sufficient for rejecting it. This can speed up loading of large mods quite significantly.
• MIDS-format MIDI support
• OPUS support, courtesy of an updated libsndfile.
• libADL/libOPN update