Merge branch 'master' of https://github.com/thelia/thelia.github.io

# By Etienne Roudeix (10) and others
# Via Etienne Roudeix (3) and Manuel Raynaud (1)
* 'master' of https://github.com/thelia/thelia.github.io:
  check syntax for smarty variable
  change variable identifier
  fix typo
  add new global loop param
  prduct and pse loop order
  currency in loops
  attribute_non_strict_match product loop attribute
  WIP - Add coupon rule Doc
  tax in loops
  POSITION loop output
  add gemfile
  fix syntax error and activate travis hook
  css substitution file
  substitutions
  Working - Fix typo
  types
  loop development
  about loops
Working : Product loop : add category_default parameter