Travis: add MongoDB support
Storage\Mongo tests
Fix typo. Hat/tip: @insom
Merge branch 'develop' of http://github.com/julien-c/oauth2-server-php into julien-c-develop
marks tests as skipped if Mongo extension is not present
tweaks to mongo tests
fixes #65 - Mongo storage returns false instead of null
more aptly names StorageTest, as we are now using it to test mongo as well
Merge branch 'julien-c-develop' into develop