Version 3.0.0

Version 3.0.0
Commented-out source code lines are trimmed.
Use of pkg_info_qox is replaced with pkg_info_qoX because extended regular expression is used actually.
Some comments and documents are revised.

	modified:   INSTALL
	modified:   README
	modified:   bin/portsreinstall
	modified:   lib/libcommand.sh
	modified:   lib/libconf.sh
	modified:   lib/libdatabase_build.sh
	modified:   lib/libdatabase_query.sh
	modified:   lib/libdatabase_record.sh
	modified:   lib/libdeinstall.sh
	modified:   lib/libmessage.sh
	modified:   lib/libmisc.sh
	modified:   lib/libpkgsys.sh
	modified:   lib/libreinstall.sh
	modified:   lib/libusage.sh
	deleted:    man/.portsreinstall.8.kate-swp
	modified:   man/portsreinstall.8
	deleted:    portsreinstall
	deleted:    portsreinstall.8
	deleted:    portsreinstall.conf