Adds legend to field and styles 80s.
Merge branch 'master' of https://github.com/tdeekens/tda452-code

* 'master' of https://github.com/tdeekens/tda452-code:
  Adds cells ids
Merge branch 'master' of https://github.com/tdeekens/tda452-code

* 'master' of https://github.com/tdeekens/tda452-code:
  Adds a dummy ui attempt
Changes boat coloring on field.
Adds control sidebar and flip btn.
Adds boattypes as data-attrs.
Adds support for placing ships and flipping them.
Merge branch 'master' of https://github.com/tdeekens/tda452-code

* 'master' of https://github.com/tdeekens/tda452-code:
  Adds functions for adding boats to a fleet and shooting at positions