2000/03/12:
  o refine texture coordinate.
  o many parameter tune up.
  o version 0.1.5 released.
    
1999/11/25:
  o version 0.1.4 released.

1999/11/24:
  o add "course record" page.
  o add audio on/off button to option page.

1999/11/22:
  o modify vehicle data to true wheel size.

1999/11/21:
  o high score recording added.
  o bug fixes.
  o laptime display has broken.

1999/11/11:
  o add skirl sound.

1999/10/19:
  o configure check tcl header file name tcl8.0.h or tcl.h.
    now GRacer may be able to compile safely in SuSE environment.
  o version 0.1.2 released.

1999/10/13:
  o modify configure.in for relax sound and graphics library requirements.
    now GRacer can run without any graphics library.
  o version 0.1.1 released.

1999/09/10:
  o add new vehicle HONDA S2000.
  o add check code into configure.in for plib game library.
  o add primary sound support using sl library included in plib game
    library. this implementation is very draft. it must be changed to tcl
    command.
  o modify ChangeLog for reflecting the changes done for gracer.

1999/09/08:
  o add audio file for exhaust sound.

1999/08/11:
  o bug fix.
  o start segmented cource data.

1999/08/10:
  o fix scene optimization info.

1999/08/09:
  o check if there is linux/joystick.h.
  o refine surface detection algorithm.

1999/07/30:
  o add png checking in configre script.
  o new all graphics library can get it's own prefix option.
  o add document of algorithm.

1999/07/26:
  o correct spell miss from kart to cart.
  o add tcldefs.h for easily modify include filename. SuSE changes tcl.h of
    version 8 to tcl8.0.h, then include file name must be changed.
  o change name from Kart to CART.
  o correct spell miss from phisics to physics.

1999/07/25:
  o gr_scene relative translate bug fixed.

1999/07/24:
  o multi-level is broken. surface detection algorism is nearly finished.
  o physical simulation tuning.

1999/07/22:
  o start supporting multi-level and loop course.
  o add stant course.

1999/07/21:
  o done implementing trigger mechanism.
  o now race can finish at specified lap count.
  o add new vehicle 'kart'. plugin for ac3d to re-centre.
  o start implementing trigger mechanism.
    Tcl script can register trigger for varios condition such as vehicle
    pass the control line.
  o new init.tcl and ui.tcl is automatically generated from *.in file.
    so, remove them.

1999/07/20:
    version info is wrong.

1999/07/19:
  o data file tuning.
  o data file modification for new architecture.

1999/07/17:
  o many bug fix and new implementation.
  o start importing vehicle simulation code.

1999/07/16:
  o model tuning. now ac2scene command handles course name and description.
  o Add vehicle description files (.grv) and license file for about page.
  o Bug fixes and about page enhancement. fade_out and roll_away is added.


1999/07/12:
  o light-weight and scriptable glut implementation test-bed.

1999/07/04:
  o add new directory contains converter from ac3d file to gracer's.

1999/06/28:
  o refine udp socket implementation. new udp is act as channel.

1999/06/27:
  o start implementing tcl based architecture.

1999/06/24:
  o add bike model.

1999/06/23:
  o fix color management of fonts. adjust material parameters of cource.

1999/06/22:
  o fix color management of font.
  o GR_ENABLE_DEBUG is changed from command line to config.h.

1999/06/21:
  o serious bug about flow control fixed.
  o version 0.0.5 released.

1999/06/20:
  o bug fixes and graphics enhancement.
  o version 0.0.4 released.

1999/06/19:
  o texture of road surface.

1999/06/17:
  o 3d model is changed from ac3d_opt to gr_scene.

1999/06/08:
  o start creating modeler independent data format.

1999/06/06:
  o separate tire models from car model.

1999/05/17:
  o avoid thread dead locking due to read socket (by poll).
  o add debug level facility.

1999/04/23:
  o add prefix for all source file.

1999/04/18:
  o add matrix functions. (homogeneous coordinate)
  o change vertex API.
  o mv phisics.{c,h} from src to common.
  o begin implementation of new phisical model based on matrix functions.

1999/02/15:
  o Add car model for rally.