Initial DB design

This commit reflects my first attempt at creating a DB that will work
for the rest of the project along with some very simple tests that
reflect that the DB is implemented properly.  It is expected that
discussion with students over the next several days will result in
modifications to the files since I might be missing a key feature that
they will notice and point out needs to be added to the system.
Initial DB design

This commit reflects my first attempt at creating a DB that will work
for the rest of the project along with some very simple tests that
reflect that the DB is implemented properly.  It is expected that
discussion with students over the next several days will result in
modifications to the files since I might be missing a key feature that
they will notice and point out needs to be added to the system.
Merge branch 'testing'

Conflicts:
	spec/models/contest_manager_spec.rb
	spec/models/contest_spec.rb
	spec/models/match_spec.rb
	spec/models/match_type_spec.rb
	spec/models/player_spec.rb
	spec/models/programming_language_spec.rb

Because I did a commit --amend to try to fix things and now I'm afraid
fast-forwarding will be permanently broken. :(  Hopefully, that isn't
the case, but we'll see.
1:N associations and create contest manager

These tests additionally check for one-to-many associations as well as
contain the initial tests for creating a contest manager.  The contest
manager tests will continue to need development.

As a part of this commit, we are creating code/ directories for
storing the contest managers, but .gitignore updates so those files
don't get included in the repo.  This should ensure that everyone has
the directories created for them, but doesn't try to pass around all
these managers accidentally.
Merge branch 'testing'
Test for final ERD layout

These tests ensure that the application meets the particular structure
laid out in the course-wide ERD.  By passing these tests, the models
should all have the correct attributes, but may be missing various
validations.  There are no functional tests correctly written, yet.
There are several ones started that are set to pending until they are
completed correctly.