Issue #202 add flame life + bomb movement

[fschlatt]

As requested in issue #202 adds further array to observation of an agent. flame_life ticks down like the bombs except it starts at 3.

EDIT: also added bomb movement direction in as further map of ints where bomb movement is int in action space

EDIT 2: when squashing commits make_flame_map function got copied twice. The second force push removed that error.

EDIT 3: the third force push were two spelling errors I found in the documentation. My bad!

[cinjon]

looks pretty good, although not sure why the need for the +1?

[cinjon]

lgtm! thanks :).