Merge pull request #20 from ZooTypers/master

merging with chels changes
multiplayer model now throws the correct exceptions when appropriate
Merge pull request #20 from ZooTypers/master

getting all the new files before i start working on it
Updating unit tests.
Merge pull request #109 from dyxliang/master

Pull
Updating unit tests.
Merge pull request #110 from dyxliang/master

Pull
updating tests
Merge pull request #111 from cdallas/master

more multi extensions
Merge pull request #7 from ZooTypers/master

Getting updates.
updating tests
Merge pull request #112 from dyxliang/master

Updating unit tests.
Merge pull request #21 from ZooTypers/master

getting new updates
Updating unit tests.
Merge pull request #113 from dyxliang/master

Pull
doing set changes before notifying observers
Merge pull request #114 from nhlien93/master

set changes before notifying observers
Merge pull request #8 from ZooTypers/master

Getting updates.
Updating the Single Player Test.
Merge branch 'master' of https://github.com/dyxliang/ZooTypers.git