2.0
 Rewrite of back-end

2.2
 gwm, backward resource compatibility, better unique support,
 splash/icon bitmap, use border color for popups, bug fixes

2.3
 each column has its own width; this probably broke -width somewhat

2.4
 comments beginning with ## are now used as info (xzul.1)
 fixes to variable width columns (xmain.c, xinit.c)
 process events every 500 rechecked names (xzul.h, zfuncs.c, main.c, xmenu.c)
 build a.out instead of elf on linux (Makefile)

2.5
 got rid of cruft from Makefile
 rewrote xfuncs.c again
 fixed a bug in the check every 500 code (main.c)

2.6
 got rid of cruft from xmenu.c
 fixed recheck functionality (main.c, zfuncs.c, xzul.h)
 took out g[XY]offset (use width/height to calc each time), and
  don't try to figure out minimum size constraints
  (xinfo.c, xfuncs.c, xmain.c, xzul.h, xinit.c, main.c)
 use mv instead of cp to install (Makefile)
 some resize fixes for twm (xfuncs.c)
 changed how -debug works (xfuncs.c, xmain.c, xzul.h, xinit.c, main.c)
 changed to batch subscriptions and use "unsafe" location requests (zfuncs.c)
 misc updates (xzul.1)

2.7
 do timed fix colors while getting locations (main.c)
 a little profiling support (main.c, Makefile)