Version 1.05:
 * support 64-bit machine.
 * bug fixes.

Version 1.04:
 * support new HTS voice format.
 * add options for changing speech speed and audio buffer size.

Version 1.03:
 * make sources simple.
 * add functions for front-end use.
 * change source format.

Verison 1.02:
 * fix a serious bug.

Version 1.01:
 * based on flite-1.4.
 * add low-pass filter stream.

Version 1.00:
 * first stable-version release.
 * context-dependent GV without silent and pause phoneme.
 * makefiles for nmake of VC.
 * save detail information.
 * bug fixes.

Version 0.91:
 * first beta-version release.
