prepare for 3.0.2

release 3.0.1

remove gpg plugin for test

release 1.6.2

release 1.6.1

fixed all error of javadoc

release 1.4.0

handling java.nio.channels.ClosedByInterruptException and release 1.2.3

[maven-release-plugin] copy for tag 1.2.2

release 1.2.1