In addition to PR#45024 by ISIHARA Takanori,
* also update refrence manual and examples PDF document files.
* exactly depend on csh, some installed scripts are csh script.
Version 3.4.1:
* add 'idct' command.
* remove all input/output data type except float from 'frame', 'snr', 'us16',
and 'uscd' command.
* add input/output data type to many commands.
* show number of byte for all input/output data type in 'x2x' command.
* rename 'pcap' command to 'pcas' command.
* add new constant (octave and cent) to 'sopr' command.
* bug fixes.
40707d1e65