Fix OS X makedist.sh script
Merge pull request #5 from tareqak/fix_osx_makedist

Fix OS X makedist.sh script
21.2 migration and crash fixes

- fixes the migration arrival description, specifically when grouping by
migration wave
- fixes a crash when attempting to reconnect after having lost
connection to df

- updated the group by health to show more critical wounds (no
breathing, gutted etc.)
- minor refactoring and cleanup
Fix OS X for 21.2
Merge pull request #6 from tareqak/21.2_osx

Fix OS X for 21.2
Go back to using new for CP437Codec on OS X

QT takes care of destroying it internally.
Merge pull request #7 from tareqak/cp437codec_osx

Go back to using new for CP437Codec on OS X