[FR] Translate the news Ruby 2.2.0-preview1

Thanks to @chatgris for his contributions.
Tiny english syntax fixes for the last news

it should be *Because of this* instead of *Because if this*
Merge pull request #829 from GRoguelon/ruby-2.2.0-preview1

[FR] Translate the news Ruby 2.2.0-preview1
Refine 2.2.0-preview1 announcement
grammar