Fix division by zero on instant leave replays

[manuelseeger]

On an instant leave there can be a division by zero.

If a player does an action and leaves the game just when the game clocks from second 0 to second 1 there can be a condition where apm > 0 but second == 0, resulting in a division by zero on line 131.

Example replay:
NeoHumanity LE (279).zip

[manuelseeger]

I did not change anything on

./examples/sc2autosave.py
./sc2reader/engine/plugins/creeptracker.py

The failing style checks come from upstream.

[cclauss]

The typos are easy to fix.

./examples/sc2autosave.py:80: Mutliplayer ==> Multiplayer
./examples/sc2autosave.py:88: Mutliplayer ==> Multiplayer
./examples/sc2autosave.py:99: Mutliplayer ==> Multiplayer
./examples/sc2autosave.py:115: Mutliplayer ==> Multiplayer
./sc2reader/engine/plugins/creeptracker.py:108: minite ==> minute

[StoicLoofah]

Thanks!