fix some bugs:

1. agent will not bomb tool.

2. agent will put bomb when safeAroundPos(pos) is true.

3. update calculation in safe_map and bombWall and bombPlayer.

4. invalid safe_map cache in more places.

5. now agent will across the corner slightly.
work in progress
try to merge
Merge branch 'master' of github.com:yan12125/HungerGamesAI
first commit to be the first version
fix some bugs
fix some bugs
delete fucking flag(state machine is hard to use) and I don't know accurate playPos