Minor code documentation changes

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Update README.md
POM pre-release cleanup + Minor changes in messages

Signed-off-by: Oleg Nenashev <nenashev@synopsys.com>
Merge branch 'master' of https://github.com/jenkinsci/cygwin-process-killer-plugin