[juw12]

• At every start Buddy removes half-finished downloads in .buddy-update (a crash or a closed laptop mid-download left ~170 MB behind). update.log stays.
• After an update, the safety copy Buddy.previous is removed once the new version has run 10 minutes. It is only removed when the new install still has its Buddy.exe.
• BUDDY_VERSION 1.1.3.
• Tests: drop_previous removes only the old copy, keeps it when the install looks broken; cleanup keeps update.log. 21 tests pass locally.