Merge pull request #2 from mmpi/master

Habe nur .gitignore geupdatet; die licence.txt ist noch leer.
Field is not a tuple anymore, but a Map. Therefore Env is changed to be Env Tribe [Tribe]. Helper function is added, such that Draw will be unaffected by future changes in Logic
Merge pull request #1 from garykl/master

Field is not a list anymore.