added argument check to status and proxy
change duplicates strategy to avoid
duplicate files in META-INFO folder,and also exclude maven folder in META-INFO.
add two tasks named with proguard and proguardCheck.Task proguard uses proguard tool to shrinking the uberjar.The size is reduced from 8M to 4.6M.
Of course here are more thing we can do to make a smaller jar and proguardCheck is a way to run test with the package jar.Be relax to change proguard.pro settings and use proguardCheck to check it works well or not.