Set touch: true on belongs_to globalized_model

I think that it is right (sorry for my bad english)
Merge pull request #330 from shlensky/patch-1

Set touch: true on belongs_to globalized_model
update travis.yml to use rbx-2.
Fix compatibility with activerecord 4.1.2.rc1

where_values_hash now taskes the reflection name as an argument, so we
need to update the monkey patch. This should be fully backwards
compatible.
Merge pull request #354 from felixbuenemann/rails-4.1.2.rc1-compatibility

Fix compatibility with activerecord 4.1.2.rc1
Use reflections or _reflections, whichever is defined.

Not beautiful, but this should fix #353 for now. Also see
rails/rails#15300.
Added Gitter chat option

[CI skip]
Refactor using reflections class method.

Via @vuvanly in #357.
Update changelog and readme.
Release 4.0.2.
Remove with_required_attributes scope from with_translations.
Add deprecation warnings for required_attributes methods.

And delete tests since we're not supporting these methods anymore.
Closes #355.
Use svg instead of png to get better image quality
Merge pull request #365 from PeterDaveHello/patch-1

Use svg instead of png to get better image quality
Update readme to explain how to add a field to the translation table
Merge pull request #370 from murtra/patch-1

Update readme to explain how to add a field to the translation table
Added Ruby 2.1, 2.2 and Rails 4.2 to CI
Added gitter webhook and enabled docker for Travis builds.
Update instance_methods.rb

perfomance optimization
perfomance optimization bugfix