Update TrackController.java
[Environment] Updated message enumeration

ADD YOUR MESSAGES!!!!
Merge pull request #9 from cnd11/master

Organized
Merge branch 'master' of https://github.com/tnason/CoE1186
Merge pull request #10 from cnd11/master

Clean up
Merge pull request #8 from cnd11/patch-1

Update TrackController.java
[TrainModel & Environment] Small updates
Merge branch 'master' of https://github.com/tnason/CoE1186
Update README.md
.
Merge branch 'master' of https://github.com/tnason/CoE1186