Version 1.8:
 * add 3D model, motions, and HTS voices of Takumi.
 * update HTS voices of Mei.

Version 1.7:
 * add English voice.

Version 1.6:
 * change charcode from SJIS to UTF-8.
 * change gravity factor.

Version 1.4:
 * add 3D model and motions of SD Mei.
 * convert HTS voice to new format.

Version 1.3.1:
 * add some 3D models and motions.
 * fix a tiny bug in .fst file.

Version 1.3:
 * change .mdf and .fst files for MMDAgent-1.3.

Version 1.1:
 * remove some options in .mdf file.

Version 1.0:
 * the stable release.

Version RC2:
 * add boot screen.

Version RC:
 * add breath, bye, imagine, laugh, surprise motions.
 * add web-browsing, full-screen, and bye-bye tasks.

Version Beta:
 * add guide task.
 * add listening motion.
 * add idle motions.
 * re-define state number.

Version Alpha:
 * the first release.
