add JVMAttach agent class.
add com.sun.tools package to pom.xml
mumu-
mumu
not track references.
fix AttachMain learn from jconsole.
fix bug. ${java.home} include '${java.home}/jre'.
ifx
java.net.ConnectionException: Connection is refused!
fix AtachMain class to accept more command args.
Run package, MVN make airypicker-agent.jar.
fix AgentMain#main to ExitHook and more signals.
AgentMain#connect is no use.
Add AttachMain#CommandListener.
Add AttachMain#registerExitHook.
Add AttachMain#registerSignalHandler()
correspond to DEBUG mode.
Add rt.jar,  which contains sun.misc.Signal
Add util/CommandListener and comm/Command class.
fix AttachAgent.