Merge pull request #57 from crimsonronin/master

Updated composer dependencies including zf2 v2.3
Fixed embedone with discriminator field/map.
Removed bad test code.
Renamed test.
Merge pull request #58 from crimsonronin/Hotfix/EmbedOneDiscriminator

EmbedOne with discriminator field/map.
Close #59. Change access control logic to test a guest role first
Update .travis.yml

code coverage
php 5.5 should pass now
Merge pull request #60 from superdweebie/guest

Close #59. Change access control logic to test a guest role first