Log Message:
Update ruby-fast_gettext to 1.1.0.

* Use travis containers to fix: undefined method `spec' for nil:NilClass
  See bundler/bundler#3558
* Support for lazy loading of .mo and .po files
  Makes `MoFile` and `PoFile` being loaded when translations are touched
  for the first time. This allows to skip loading unused translations
  and speed up application load time. The original behavior is still
  available when `:eager_load => true` switch is used.
* simpler load paths