* Add backend-specific translations generator (`rails generate
mobility:translations`)
([9dbe4d](https://github.com/shioyama/mobility/commit/9dbe4d2221f3c97ec265c297ad2be201a5180151),
[583a51](https://github.com/shioyama/mobility/commit/583a51c9945615460079a1f81ffbd7a69d91a581),
[6b9605](https://github.com/shioyama/mobility/commit/6b9605ed6fa599578fd36065ac17e6b2b93a8378),
[e2e807](https://github.com/shioyama/mobility/commit/e2e807494bd1f642c67a0dbd678cea49b16f11b0))
* Fix bug with combination of Column backend and fallthrough accessors
([212f07](https://github.com/shioyama/mobility/commit/212f078145f613ab85faf7dbf993c7da9a91bcdd))
* Raise `InvalidLocale` when getting a locale that is not available
([d4f0ee](https://github.com/shioyama/mobility/commit/d4f0ee20d5507ba147f31aa03081f685e31ab46a))
* Pass options to backend write from setter
([5d224f](https://github.com/shioyama/mobility/commit/5d224fa7bb877d9dc1f6c3983b096b22aeea5bc7))
* Correctly include `FallthroughAccessors` module in module, not backend
([d9471d](https://github.com/shioyama/mobility/commit/d9471db7ab71766a98e4e411b476d2197fbf7f51))
* Handle presence methods in `FallthroughAccessors`
([66f630](https://github.com/shioyama/mobility/commit/66f630548c01b8d380c6aeeab4c32b085133c754))