Updates to js templates for easier Farsi compatibility.
Progress on #52 (Microlessons following Task Sequence):

* Checking answers prompts lesson to determine which task should be shown next, or if the user should proceed to the next lesson.
* Accuracy average is updated in the base task view during checkAnswer.
* Small refactor in tasks.
* Translate_word task now sends the CTS ids of all the words in the phrase the user sees.