Bump version 0.5.4

Version 0.5.3

* Prefer single-quoted strings (Andrey Koleshko)
* Test for Model.design_document (Andrey Koleshko)
* Support for batch finding multiple objects by id (Jon Moses)
* Test for activemodel instead of rails for activemodel validations
* Update couchbase dependency to 1.3.0

Version 0.5.2

* Fix attribute inheritance when subclassing (Mike Evans)
* Added as_json method for rails JSON responses (Stephen von Takach)
* Add contributing document
* Fix test hiding
* Remove comments from the javascript sources
* Reduce development dependencies and update jar version

Version 0.5.1

* Introduce save! and create! methods and raise RecordInvalid only from them

Version 0.5.0

* Update template for map function
* Use extended get for #find_by_id
* Do not use HashWithIndifferentAccess class unless it defined
* Pass options to #create method
* Ensure validness on create
* Fix storing raw data
* Define read_attribute and write_attribute methods
* Support couchbase 1.2.0.z.beta4

Version 0.4.4

* Make #to_param aware about keys

Version 0.4.2

* Update CAS value after mutation
* Added ability to pass options to mutators. Thanks to @kierangraham
* Always try to include Rails stuff into model
* Use key if id is nil (makes sense for some view results)

Version 0.4.1

* Put support notes in README
* Add note about validations in the README
* Update repo URL
* RCBC-85 Fix typo in `save' method

Version 0.4.0

* Add validation hooks for Rails application
* Check meta presence as more robust indicator of key presence

Release 0.3.1 version

Allow to specify default options for mutations