Reintroduce en-US.yml

Fixes #317 and the following Rails' ticket and pull request:
* https://github.com/rails/rails/issues/9884
* https://github.com/rails/rails/pull/10020
Merge pull request #363 from digitalfrost/patch-317

Reintroduce en-US.yml
Add Romanian transliteration
Merge pull request #364 from andreierdoss/ro_transliteration

Add Romanian transliteration
Update fr.yml

fixed mistakes in abbr_day_names and day_names
Update zh-TW.yml

translated the word "byte"
Update zh-TW.yml

added restrict_dependent_destroy for zh-TW
Merge pull request #365 from jackhsu978/patch-1

Update fr.yml
Merge pull request #366 from jackhsu978/patch-2

Update zh-TW.yml
Merge pull request #367 from jackhsu978/patch-3

Update zh-TW.yml