Quakespasm

My branch of Quakespasm with a few quality-of-life features and changes.

• QuakeWorld hud option (controlled though "cl_sbar" cvar) including expansion support
• Re-enable weapon viewmodel vertical offset with status bar enabled
  • also adjusts with status bar scale
• Scoot centerprint messages up off the crosshair
• Recalculate refdef on sbar scale change
• Automatic UI/HUD scaling
  • (set scr_sbarscale/menuscale/conscale to 0 to use, or Scale slider to far left)
  • Handy as a default setting
  • Scales for even pixel size
• "vid_width 0" or "vid_height 0" to use desktop resolution
  • Handy as a default setting

Upcoming:

• Widescreen status bar
  • (hacky, this will probably be redone before being committed)
• Try to make the font textures use an array to prevent bleeding on seams, allowing linear filtering