Ember Quiz Stats - Matching

Question statistics like those for FIMB and Multiple Dropdowns.

Closes CNVS-13072

TEST PLAN
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  - create a quiz with matching questions
  - take it by a number of students, score differently
  - visit ember quiz stats
  - verify that each left-side "answer" gets its own button
  - click the button and verify that:
    - the possible matches as well as the distractors are charted in the
      answer response distribution chart
    - the correct answer is highlighted in green
    - the ratios should be correct
  - expand the question details to display the answers
    - verify that no matter which answer set you're previewing, all the
      possible matches are displayed, but only the correct one gets
      highlighted differently as you activate an answer set
  - really, it's the same AC as for FIMB and MDropdowns in
    https://gerrit.instructure.com/#/c/34804/

Change-Id: I4fb18c041b7648f20223766dd402bfdbcceb3b55
Reviewed-on: https://gerrit.instructure.com/35428
Reviewed-by: Derek DeVries <ddevries@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Ahmad Amireh <ahmad@instructure.com>