Fix options broken bug
fixes #532
Merge pull request #536 from seuros/masterstring

Convert tags to string : fixes #532
fix typo
[Bug fix] Removing a tag from a record was affecting all records with the same tag. Fixes #538
Merge pull request #540 from seuros/bugfix

[Bug fix] Fixes #538
Version bump
Merge pull request #535 from akicho8/tagged_with_options_delete_fix

[Bug fix] Fix options broken
Update travis matrix

Fix specs for postgresql