v1.0  5/11/95 first public release

v1.1    Added an Imakefile
    pressing button no longer restarts game while entering a high
        score.
    Added info to title screen.
    #ifdef'd out the cheat keys.  #define IM_A_BIG_FAT_CHEATER
    to get them back :)
    added patches for AIX, HPUX, SUNOS, ULTRIX, thanks to
    Johnathan Hardwick for all of them!
    Added keyboard controls

v1.2    Shrunk window to 400x500 (Was 400x600)
    Started adding Galaga style entrance paths
    Changed name to XGalaga
    Bonus pods, weapon upgrades
    SOUND!  For Linux and FreeBSD anyway.  Bug Sujal for others.
    added some command line switches 
    changed default controls to keyboard.

v1.2a   FreeBSD works for real
    Imakefile had CDEBUGFLAGS set for my machine. oops.
    forgot to #ifdef a coupld of play_sound()'s.  oops.

v1.3    added personal high scores, expanded global to 20 places
    reloads high scores before checking/adding a score (in case
      someone else made the list)
    compiles clean with -Wall
    title page cycles through info
    sped up aliens during entry phase.  Bit of a kludge to keep
      the paths I have defined already working about the same, but
      no one but me is likely to care ;-)

v1.3a   Took out the $@#!%^ usleep entirely.  select should be fine on
    everyone's system.

v1.4    changed x11window.c into libXsprite.  Very few code changes, just
      took a chainsaw to it and spilt it into manageable chunks.
    new alien types, new levels, new prizes (HINT: not every effect
      of a prize need be immediately apparent.  Looking at the source
      is cheating ;-)
    grabs the pointer intelligently - only when using the mouse to play,
      and only when actually playing.  Ungrabs at the title screen
      and when paused.
    tiny (3x3) mouse pointer
    Compile option to automatically insert the user's real name
      into the high score list.  (Also fills it in as the default
      if prompting for a name) look in the Imakefile to turn this on
    Help info on title screen, scoring info gone(because the ships
      change from level to level now)
    Other minor bugs fixed.
    Lots of tweaks for difficulty

v1.4a   bug that caused segfaults on hpux(and likely others, I don't
    know why I didn't run into it actually) fixed.

v1.5    15 levels
    Aliens will not attack until all waves have entered. (You're 
      welcome, Rick.)
    Fixed for TrueColor and Mono displays. (XStoreColor causes them
      to crash - just removed the color cycling on the high
      scores for those displays).  Also, no more strange colored
          squares around objects on TrueColor displays.  There may
      still be invisible ships on mono displays - this is a
      problem with libXpm translating sprites with all dark
          colors into all black sprites.  Solution: draw brighter
      sprites.

v1.5a   Added Sun and NAS sound support, thanks to Paul Kendall.
      NAS should work on ANY system with NAS installed.

v1.6    Added high score hacks from Bill Clarke <bill@discworld.anu.edu.au>
          compile time option NOSCOREHOGS changes the high scores to allow
          only one high score per uid.  Note that you will have to
          erase any existing *global* score file to use this mod.  The
          personal score files are still ok.
          Also, -scores option on the command line prints out the
          score table and exits.
    Ship display shows the number left when > 6 ships
          remain. (also from Bill, them aussies is GOOD!)
    Gets harder every 15 levels.  people getting near (past?)
          level 200 is really disgusting, stop it!  (The guy that
          wanted a save game option was the last straw ;)  May need to
          be harder still, I'll think up something more fiendish for 1.7
    Added Imakefile defs for Solaris (-DUSE_LRAND48 was apparently needed.

v1.6b   Single bug fix, on some systems (SGI and Linux ELF notably) the game just
      froze when you started it.  It was just an unitialized variable.

v1.6c   I moved, addresses (both snail and email) changed.
    Added kludge for a bug(?) in recent linux kernels with only the PC speaker.
        #define PCSP_ONLY in the Imakefile if that describes your system AND
        sound doesn't work otherwise.
    Added #defines for Solaris in xgal.sndsrv.sun.c for bzero and bcopy
    Added a patch from Martin Eskildsen to make the entry positions work
        if WINWIDTH and WINHEIGHT are redefined.  (Compile time option,
        doesn't mean you can scale the window!)
    Enemy torp speed now increases every five levels, instead of 15.
    Thought seriously about doing 5 more levels and some other stuff
        and making this v1.7.  Maybe soon.  So many ideas, so little
        time.
