Added Better support for PowerShell. #494 Changed Keep the cache file of effective pom for diagnosis. #319 Fixed Fix: mvnw is not identified if .mvn folder doesn't exist. #504 Fix: notification "Maven executable not found in PATH" pops up for multiple times. #501 Fix: tilde was not expanded as home directory in unix-like systems. #507 Fix: Maven output didn't write to the integrated terminal window. #489