Multilingual search. Ref #4

- Based on @jipiboily solution, made it cleaner using chained method to avoid repeating spree core search logic & made cleaner SQL query building.
Update spree version to 1.2.x
Search for Spree 1.2 updated logic
Fix for SQL injections, use ActiveRecord querying
Merge branch 'master' of https://github.com/hooktstudios/spree_multi_lingual into 1-3-stable

* 'master' of https://github.com/hooktstudios/spree_multi_lingual:
  Fix for SQL injections, use ActiveRecord querying
  Search for Spree 1.2 updated logic
  Update spree version to 1.2.x
  Multilingual search. Ref #4
  Update email translations (add accents)
  Add translations for Spree::ShippingMethod (no UI controls yet)
  Add translations for Spree::TaxRate (no UI controls yet)

Conflicts:
	README.md
	spree_multi_lingual.gemspec
using quoted translation table name from product model
Merge branch '1-3-stable'

* 1-3-stable:
  using quoted translation table name from product model
  Fix for SQL injections, use ActiveRecord querying
  Search for Spree 1.2 updated logic
  Update spree version to 1.2.x
  Multilingual search. Ref #4