Fix initialization of engine

• Remove unnecessary extra reset call

Fix RNG

• Fix random number generation to allow for deterministic gameplay
• Fix random number generation to function consistently
• Implement --seed/-S flag in CLI for seeding the game

Fix B-type resets

• fix B-type to reset properly
• fix both A and B type to use backup restore for a speedup

board_height in info dictionary

add the board height to the info dictionary

A and B game modes

game modes for A and B types

v3, v4

penalize increases in height.

update nes-py

update nes-py version to 8.0

Fix 'lines' reward signal

• fix 'lines' reward stream to trigger only once
  • return the raw number of lines instead of 2^(number of lines) - 1
• fix the CLI to use the environment command line arugment

Cleanup PyPi Information

move to production / stable, specify as python 3 only.

Lines Cleared Reward

add a new version to reward lines cleared – i.e., Tetris-v0.