DAMAGECOUNT, DEATHCOUNT, HITCOUNT are not reset to zero on game.new_episode()

[alex-petrenko]

• Values of certain variables (DEATHCOUNT, DEATHCOUNT, HITCOUNT) are not reset to 0 on the episode boundary. They keep growing as the agent plays an episode after episode.
• ViZDoom version you are using: latest version from master
• information about your OS platform, distribution and environment: Python 3.7, Ubuntu 18.04
• additional information: other variables (like FRAGCOUNT & KILLCOUNT) are processed correctly. Looking at the code in viz_game.cpp, they are indeed handled differently than the ones mentioned above.