2-4 through 2-6 setup

Slight enum fixes
DoorScript edited for improved use.
New placeholder prefabs added for scenes.
Conditional Door Script and Prefab added.
Merge https://github.com/JohnMai/WhiteSharks
new stuff

new stuff
Merge branch 'master' of https://github.com/JohnMai/WhiteSharks
Merge pull request #248 from Kiroshima/master

2-4 through 2-6 setup.
chapter 2 stuff

chapter 2 stuff
Merge pull request #251 from JohnMai/anthonylim

Remove spammy Debug.Log, remove ESC menu