change how multiple languages are used

- revise how users with multiple language restrictions use cedar
  in response to the need for handling bilingual participants who
  provide responses in both english and french
- typists with two language restrictions will have words in those
  languages loaded into jquery autocomplete
- autocomplete now takes a word and its primary key id as label and value
  pairs: this simplifies word classification at run time when the
  word id is known apriori
- changed test_classify_word to more appropriately named test_entry_classify_word
  and updated operation table accordingly