class Restforce::Mash

def build(val, client)

Restforce::Mash objects.
appropriate Restforce::Collection, Restforce::SObject and
Pass in an Array or Hash and it will be recursively converted into the 
def build(val, client)
  if val.is_a?(Array)
    val.collect { |a_val| self.build(a_val, client) }
  elsif val.is_a?(Hash)
    self.klass(val).new(val, client)
  else
    val
  end
end