Update to 1.820
    
    - New upstream release 1.820
      - Check for EINTR during sysread and syswrite
      - Improved non-shared handles constructed with MCE::Shared::Handle
      - Reap MCE::Hobo's from script exiting during development process
      - Calibrated the number of data-channels for IPC
      - Completed validation for using MCE::Shared with 200+ cores
      - Completed validation for running MCE on a box having 100+ cores
      - Tuned the number of data-channels for IPC, similar to MCE
      - Bumped MCE dependency to 1.824