2021-04-17  Masaya Tojo  <masaya@tojo.tokyo>

	Cheange interfaces.
	* configure.ac: Version Up.
	* extract-green-color.scm (show-version): Version Up.
	(main)[hue-minus]: Removed.
	[hue-plus]: Removed.
	[hue-red]: New local variable.
	[hue-blue]: New local variable.
	(show-usage): Change help message.

	doc: Update ChangeLog.
	* ChangeLog: Update.

	guix: Use development version.
	* guix.scm (extract-green-color)[version]: Use development version.

	Version up from `1.0.1` to `1.0.2`.
	* configure.ac (AC_INIT): Version up from `1.0.1` to `1.0.2`.
	* guix.scm (extract-green-color)[version]: Version up from `1.0.1` to `1.0.2`.

	doc: Fix `Install with Guix` section.
	* README.md (Install with Guix): Fix the exmaple of `channel.scm`.

2021-04-14  Masaya Tojo  <masaya@tojo.tokyo>

	Update ChangeLog.
	* ChangeLog: Add logs.

	Version up.
	* configure.ac (AC_INIT): Verson up from `1.0.0` to `1.0.1`.
	* guix.scm (extract-green-color)[version]: Verson up from `1.0.0` to `1.0.1`.

	Update ChangeLog.
	* ChangeLog: Add logs.

	Add `Install from the source' section.
	* README.md[Install from the source]: New section.

	Add ChangeLog file.
	* ChangeLog: New file.

	Edit `README.md` file.
	* README.md: Rename title from `extract-green-color` to `Extract-green-color`.
	[Requirements]: New section.
	[Installation]: New section.
	[Usage]: New section.
	[License]: New section.

	Initial commit.