Cleanroom Relauncher

Added

• Respect the launcher's original heap space setting arguments (-Xms, -Xmx) if none is specified in the configuration

Fixed

• Compatibility with newer MMC pack formats (starting from Cleanroom 0.3.19)
• Encode and decode configuration with UTF-8
• Some Linux installs not being detected properly (updated JavaUtils to 1.1.3)

Changed

• Thanks to @ZZZank, using MethodHandles to call the wrapper class's main method instead of standard reflection, allows for a cleaner stacktrace