4 Fix for enemy dispersion on torpedo hits.
7 Ubuntu has abolished /usr/bin/python, change shebang to python3.
10 Fixed a longstanding bug in the chart display.
11 Minor port fixes for recent Python 23 versions.
12 Test suite is TAPified.
15 Now runs identically under Python 2 and Python 3.
18 Fixes for deathray, formatting, double-counting in score logic.
21 Crash bug fix when docking with no starbase in sector.
24 Added color. Added BSD Trek 'CAPTURE' and 'CLOAK' (from Tom Almy's
25 2013 changes). Many bug fixes.
28 Packaging fixes, pychecker cleanup, cope with Freshmeat name changes.
31 Game code moved to Python. Many bug fixes.