issue #6: initial field generation
issue #20 - Rendering robots on GUI
I assume that squad have num of them and their position(tile where they
are).
issue #6: initial field generation
Merge branch '6_initializeField' of github.com:AI-comp/Terraforming into 6_initializeField

Conflicts:
	src/main/scala/net/aicomp/entity/Field.scala
	src/main/scala/net/aicomp/entity/Tile.scala
Merge pull request #37 from AI-comp/6_initializeField

issue #6: initial field generation
Update README.md
issue #20 - Rendering robots on GUI
field.indices から タイル情報を取得するよう修正
また、後々修正が必要な箇所にはTODOを追加
issue #20 - Rendering robots on GUI
・変数名変更
・座標をタプルの形で取得するように変更
Merge pull request #38 from AI-comp/20_robots_on_gui

issue #20 - Rendering robots on GUI
implement finish command
Merge pull request #47 from AI-comp/19_FinishCommand

implement finish command
Merge branch 'master' into 31_scalacheck