added challenge model test with mocha and challenge controller test with karma
Add database migration
Remove database sync by sequalize
update test config file
added testing submission 1 #49
Merge pull request #50 from topcoderinc/49_testing

49 testing
Merge pull request #39 from topcoderinc/db-migrate

Db migrate
db-migrate fix for #54 also removed id from test, which is now the original submission
added primary key req to db #55 close
implement ng-grid to challenges list view